#eratosthenes — Public Fediverse posts

We see the fundamental theorem of arithmetic and the sieve of Eratosthenes in the decomposition into weight × level + jump of natural numbers. Applied to prime numbers this decomposition leads to a new classification of primes.

#decompwlj #math #mathematics #maths #sequence #OEIS #graph #natural #numbers #primes #PrimeNumbers #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieveOfEratosthenes #Eratosthenes #sieve #fundamental #theorem #arithmetic #research

We see the fundamental theorem of arithmetic and the sieve of Eratosthenes in the decomposition into weight × level + jump of natural numbers. Applied to prime numbers this decomposition leads to a new classification of primes.

#decompwlj #math #mathematics #maths #sequence #OEIS #graph #natural #numbers #primes #PrimeNumbers #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieveOfEratosthenes #Eratosthenes #sieve #fundamental #theorem #arithmetic #research

We see the fundamental theorem of arithmetic and the sieve of Eratosthenes in the decomposition into weight × level + jump of natural numbers. Applied to prime numbers this decomposition leads to a new classification of primes.

#decompwlj #math #mathematics #maths #sequence #OEIS #graph #natural #numbers #primes #PrimeNumbers #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieveOfEratosthenes #Eratosthenes #sieve #fundamental #theorem #arithmetic #research

We see the fundamental theorem of arithmetic and the sieve of Eratosthenes in the decomposition into weight × level + jump of natural numbers. Applied to prime numbers this decomposition leads to a new classification of primes.

#decompwlj #math #mathematics #maths #sequence #OEIS #graph #natural #numbers #primes #PrimeNumbers #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieveOfEratosthenes #Eratosthenes #sieve #fundamental #theorem #arithmetic #research

We see the fundamental theorem of arithmetic and the sieve of Eratosthenes in the decomposition into weight × level + jump of natural numbers. Applied to prime numbers this decomposition leads to a new classification of primes.

#decompwlj #math #mathematics #maths #sequence #OEIS #graph #natural #numbers #primes #PrimeNumbers #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieveOfEratosthenes #Eratosthenes #sieve #fundamental #theorem #arithmetic #research

In number theory, #Lucky #Numbers are a specific set of natural numbers generated by a "sieve" algorithm similar to the Sieve of #Eratosthenes used for primes.

https://knowledgezone.co.in/kbits/69eae9b4794bd60efd6e20e9

We see the fundamental theorem of arithmetic and the sieve of Eratosthenes in the decomposition into weight × level + jump of natural numbers. Applied to prime numbers this decomposition leads to a new classification of primes.

#decompwlj #math #mathematics #maths #sequence #OEIS #graph #natural #numbers #primes #PrimeNumbers #palindromes #animation #FundamentalTheoremOfArithmetic #sequences #NumberTheory #classification #integer #decomposition #number #theory #equation #graphs #sieveOfEratosthenes #Eratosthenes #sieve #fundamental #theorem #arithmetic #research

Wildfire burns 1.3% of Cyprus’ land, satellite data shows, KNEWS https://www.byteseu.com/1237221/ #Cyprus #damage #Eratosthenes #ForestFire #LandLoss #limassol #wildfire

Saturday's Summer Sostice experiment

Am Samstag startet das Sommersonnenwende-Experiment. Knapp 2300 Jahre nach #Eratosthenes bestimmen wir wie er den Umfang der #Erde nach seiner Methode. Und jeder kann mitmachen.

Wie es geht, ist in dem Video beschrieben.

Jeder braucht nur einen Stab, den er senkrecht auf einer ebenen Fläche ausrichten kann, und ein Maßband. Dazu eine Kamera für ein Beweisfoto.

https://www.youtube.com/watch?v=H8L_1OchGpg

#FlatEarth #Sommersonnenwende #SummerSostice #scimandan #science

Right, so, if we then gave all the cows typewriters, how long would it take one of them to reproduce all the works of Shakespeare?
https://www.youtube.com/watch?v=V2S39AgjFpQ
#Archimedes #Eratosthenes #maths #Diophantus #Diophantine #NumberTheory #mathematics #math #cattle #cows #history

The region around #MontesApenninus including #Eratosthenes & #Archimedes at 16:59UT 6th Feb '25. Taken from Oxfordshire, UK with a #WilliamOptics 70mm refractor, #Celestron 3x Barlow & #ASI120MC camera. Best 50% of 1,000 frames #LunarPhotography #LunarCraters #LunarMountains

The region around #MontesApenninus including #Eratosthenes & #Archimedes at 16:59UT 6th Feb '25. Taken from Oxfordshire, UK with a #WilliamOptics 70mm refractor, #Celestron 3x Barlow & #ASI120MC camera. Best 50% of 1,000 frames #LunarPhotography #LunarCraters #LunarMountains

The region around #MontesApenninus including #Eratosthenes & #Archimedes at 16:59UT 6th Feb '25. Taken from Oxfordshire, UK with a #WilliamOptics 70mm refractor, #Celestron 3x Barlow & #ASI120MC camera. Best 50% of 1,000 frames #LunarPhotography #LunarCraters #LunarMountains

The region around #MontesApenninus including #Eratosthenes & #Archimedes at 16:59UT 6th Feb '25. Taken from Oxfordshire, UK with a #WilliamOptics 70mm refractor, #Celestron 3x Barlow & #ASI120MC camera. Best 50% of 1,000 frames #LunarPhotography #LunarCraters #LunarMountains

The region around #MontesApenninus including #Eratosthenes & #Archimedes at 16:59UT 6th Feb '25. Taken from Oxfordshire, UK with a #WilliamOptics 70mm refractor, #Celestron 3x Barlow & #ASI120MC camera. Best 50% of 1,000 frames #LunarPhotography #LunarCraters #LunarMountains

Sun rising over #Plato, #MontesApenninus & #Eratosthenes, and #Clavius. The images were taken 2hrs 45mins apart on 6th Feb '25 from #Oxfordshire, UK with a 70mm refractor, 3x Barlow + #ASI120MC camera #LunarSunrise #CraterSunrise

How Eratosthenes measured the earth: part 4 of 4.

The angle of the sun is the last hurdle Eratosthenes had to overcome with his data collection methods.

Here we review the popularly believed story -- measuring shadows of sticks -- before looking at a more likely and methodologically simpler alternative.

Concludes with a bibliography.

(Reading time: 15 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/07/eratosthenes-4.html

How Eratosthenes measured the earth: part 4 of 4.

The angle of the sun is the last hurdle Eratosthenes had to overcome with his data collection methods.

Here we review the popularly believed story -- measuring shadows of sticks -- before looking at a more likely and methodologically simpler alternative.

Concludes with a bibliography.

(Reading time: 15 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/07/eratosthenes-4.html

How Eratosthenes measured the earth: part 4 of 4.

The angle of the sun is the last hurdle Eratosthenes had to overcome with his data collection methods.

Here we review the popularly believed story -- measuring shadows of sticks -- before looking at a more likely and methodologically simpler alternative.

Concludes with a bibliography.

(Reading time: 15 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/07/eratosthenes-4.html

How Eratosthenes measured the earth: part 4 of 4.

The angle of the sun is the last hurdle Eratosthenes had to overcome with his data collection methods.

Here we review the popularly believed story -- measuring shadows of sticks -- before looking at a more likely and methodologically simpler alternative.

Concludes with a bibliography.

(Reading time: 15 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/07/eratosthenes-4.html

How Eratosthenes measured the earth: part 4 of 4.

The angle of the sun is the last hurdle Eratosthenes had to overcome with his data collection methods.

Here we review the popularly believed story -- measuring shadows of sticks -- before looking at a more likely and methodologically simpler alternative.

Concludes with a bibliography.

(Reading time: 15 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/07/eratosthenes-4.html

How Eratosthenes measured the earth, part 3 of 4: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units?

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

How Eratosthenes measured the earth, part 3 of 4: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units?

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

How Eratosthenes measured the earth, part 3 of 4: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units?

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

How Eratosthenes measured the earth, part 3 of 4: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units?

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

How Eratosthenes measured the earth, part 3 of 4: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units?

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

The ongoing story of how Eratosthenes measured the earth, based on ancient evidence. Part 2b: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units? What's the difference between the 'metrological stadion' and the 'itinerary stadion'? (And how do they compare to the kilometre and the 'itinerary kilometre'?)

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

The ongoing story of how Eratosthenes measured the earth, based on ancient evidence. Part 2b: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units? What's the difference between the 'metrological stadion' and the 'itinerary stadion'? (And how do they compare to the kilometre and the 'itinerary kilometre'?)

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

The ongoing story of how Eratosthenes measured the earth, based on ancient evidence. Part 2b: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units? What's the difference between the 'metrological stadion' and the 'itinerary stadion'? (And how do they compare to the kilometre and the 'itinerary kilometre'?)

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

The ongoing story of how Eratosthenes measured the earth, based on ancient evidence. Part 2b: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units? What's the difference between the 'metrological stadion' and the 'itinerary stadion'? (And how do they compare to the kilometre and the 'itinerary kilometre'?)

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

The ongoing story of how Eratosthenes measured the earth, based on ancient evidence. Part 2b: distance.

How did Eratosthenes find out the distance from Syene to Meroë? What units did he use, and what do they mean in modern units? What's the difference between the 'metrological stadion' and the 'itinerary stadion'? (And how do they compare to the kilometre and the 'itinerary kilometre'?)

(Reading time: 18 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2b.html

How Eratosthenes measured the earth: an account grounded in ancient evidence.

Part 2a explains the basic idea underlying the measurement, and begins to look at the hurdles involved in obtaining observational data.

Parts 2b and 2c will look at what we know about measuring overland distances, and 2nd century BCE instrumentation for observing the angle of the sun.

(Reading time: 16 minutes)
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html
#ancientscience #eratosthenes #geography #astronomy #egypt #ancientgreece

How Eratosthenes measured the earth: an account grounded in ancient evidence.

Part 2a explains the basic idea underlying the measurement, and begins to look at the hurdles involved in obtaining observational data.

Parts 2b and 2c will look at what we know about measuring overland distances, and 2nd century BCE instrumentation for observing the angle of the sun.

(Reading time: 16 minutes)
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html
#ancientscience #eratosthenes #geography #astronomy #egypt #ancientgreece

How Eratosthenes measured the earth: an account grounded in ancient evidence.

Part 2a explains the basic idea underlying the measurement, and begins to look at the hurdles involved in obtaining observational data.

Parts 2b and 2c will look at what we know about measuring overland distances, and 2nd century BCE instrumentation for observing the angle of the sun.

(Reading time: 16 minutes)
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html
#ancientscience #eratosthenes #geography #astronomy #egypt #ancientgreece

How Eratosthenes measured the earth: an account grounded in ancient evidence.

Part 2a explains the basic idea underlying the measurement, and begins to look at the hurdles involved in obtaining observational data.

Parts 2b and 2c will look at what we know about measuring overland distances, and 2nd century BCE instrumentation for observing the angle of the sun.

(Reading time: 16 minutes)
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html
#ancientscience #eratosthenes #geography #astronomy #egypt #ancientgreece

How Eratosthenes measured the earth: an account grounded in ancient evidence.

Part 2a explains the basic idea underlying the measurement, and begins to look at the hurdles involved in obtaining observational data.

Parts 2b and 2c will look at what we know about measuring overland distances, and 2nd century BCE instrumentation for observing the angle of the sun.

(Reading time: 16 minutes)
http://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html
#ancientscience #eratosthenes #geography #astronomy #egypt #ancientgreece

How Eratosthenes measured the earth. Part 2a.

The ongoing story of Eratosthenes' measurement, grounded in ancient evidence.

Part 2a introduces the basic principle of the measurement; the technological hurdles involved; and how he solved the problem of simultaneous measurements.

(This was _not_ a problem to be solved with two sticks!)

(Reading time: 16 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html

How Eratosthenes measured the earth. Part 2a.

The ongoing story of Eratosthenes' measurement, grounded in ancient evidence.

Part 2a introduces the basic principle of the measurement; the technological hurdles involved; and how he solved the problem of simultaneous measurements.

(This was _not_ a problem to be solved with two sticks!)

(Reading time: 16 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html

How Eratosthenes measured the earth. Part 2a.

The ongoing story of Eratosthenes' measurement, grounded in ancient evidence.

Part 2a introduces the basic principle of the measurement; the technological hurdles involved; and how he solved the problem of simultaneous measurements.

(This was _not_ a problem to be solved with two sticks!)

(Reading time: 16 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html

How Eratosthenes measured the earth. Part 2a.

The ongoing story of Eratosthenes' measurement, grounded in ancient evidence.

Part 2a introduces the basic principle of the measurement; the technological hurdles involved; and how he solved the problem of simultaneous measurements.

(This was _not_ a problem to be solved with two sticks!)

(Reading time: 16 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html

How Eratosthenes measured the earth. Part 2a.

The ongoing story of Eratosthenes' measurement, grounded in ancient evidence.

Part 2a introduces the basic principle of the measurement; the technological hurdles involved; and how he solved the problem of simultaneous measurements.

(This was _not_ a problem to be solved with two sticks!)

(Reading time: 16 minutes)
#ancientscience #eratosthenes #geography #ancientgreece
https://kiwihellenist.blogspot.com/2023/06/eratosthenes-2a.html

How Eratosthenes measured the earth. Part 1: the discovery of the earth's shape.

Before 400 BCE, everyone was a flat-earther. Afterwards, it gets hard to find people who weren't aware that the earth is round.

A look at early Greek thought on the shape of the cosmos, the earth's location, and the angle of the ecliptic, leading up to the first estimate of the earth's size in Aristotle.

(Reading time: 18 minutes)
https://kiwihellenist.blogspot.com/2023/04/eratosthenes-1.html
#ancientscience #eratosthenes #geography #ancientgreece

How Eratosthenes measured the earth. Part 1: the discovery of the earth's shape.

Before 400 BCE, everyone was a flat-earther. Afterwards, it gets hard to find people who weren't aware that the earth is round.

A look at early Greek thought on the shape of the cosmos, the earth's location, and the angle of the ecliptic, leading up to the first estimate of the earth's size in Aristotle.

(Reading time: 18 minutes)
https://kiwihellenist.blogspot.com/2023/04/eratosthenes-1.html
#ancientscience #eratosthenes #geography #ancientgreece

How Eratosthenes measured the earth. Part 1: the discovery of the earth's shape.

Before 400 BCE, everyone was a flat-earther. Afterwards, it gets hard to find people who weren't aware that the earth is round.

A look at early Greek thought on the shape of the cosmos, the earth's location, and the angle of the ecliptic, leading up to the first estimate of the earth's size in Aristotle.

(Reading time: 18 minutes)
https://kiwihellenist.blogspot.com/2023/04/eratosthenes-1.html
#ancientscience #eratosthenes #geography #ancientgreece

How Eratosthenes measured the earth. Part 1: the discovery of the earth's shape.

Before 400 BCE, everyone was a flat-earther. Afterwards, it gets hard to find people who weren't aware that the earth is round.

A look at early Greek thought on the shape of the cosmos, the earth's location, and the angle of the ecliptic, leading up to the first estimate of the earth's size in Aristotle.

(Reading time: 18 minutes)
https://kiwihellenist.blogspot.com/2023/04/eratosthenes-1.html
#ancientscience #eratosthenes #geography #ancientgreece

How Eratosthenes measured the earth. Part 1: the discovery of the earth's shape.

Before 400 BCE, everyone was a flat-earther. Afterwards, it gets hard to find people who weren't aware that the earth is round.

A look at early Greek thought on the shape of the cosmos, the earth's location, and the angle of the ecliptic, leading up to the first estimate of the earth's size in Aristotle.

(Reading time: 18 minutes)
https://kiwihellenist.blogspot.com/2023/04/eratosthenes-1.html
#ancientscience #eratosthenes #geography #ancientgreece