Tags » Primes

The Riemann zeta function and prime numbers

In a previous post I defined the famous Riemann zeta function,

Today I want to give you a glimpse of what it has to do with prime numbers—which is a big part of why it is so famous. 693 more words

Number Theory

A group with no composition series

The Jordan-Holder theorem is a group-theoretic analogue of the uniqueness of prime factorizations. A “factorization” of a (finite) group is called a composition series.

Definition.  159 more words

A terrific list of problems from Matt Enlow

Saw a great tweet from Matt Enlow today:

Final draft of my "research" Qs for Advanced Topics. I feel like Willy Wonka…

Hold your breath… make a wish… count to three… …

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Sigma Announces New ART Series Lenses

No… These aren’t cinema lenses. They’re auto-focus, still photography lenses. Sigma has just announced three new lenses in their ART line of still-photo lenses: 14mm f/1.8, 135mm f/1.8, and a 24-70mm f/2.8. 480 more words


Industrial Strength Left-truncated Prime Checker

I saw a post on Facebook about left-truncatable prime numbers.  A left-truncatable prime number is a prime number that is still prime with each successive removal of its left-most digit.   1,066 more words

The Next Leader Of Cybertron Is A Total Beast

(Source: kotaku.com)

Earlier this month a Transformer near and dear to my heart faced off against Ultra Magnus, Star Saber and Deathsaurus in a fan vote for who would be the next ‘bot to wield the Matrix of Leadership. 210 more words