This is sequence A001481 in OEIS.

Here is the link.

keywords:

[Mathematics]

[Number Theory]

[closed under multiplication]

# Day: April 25, 2020

# On-line Encyclopedia of Integer Sequences (OEIS)

(Online Encyclopedia of Integer Sequences (OEIS))

(online list of integer sequences)

Here is the link.

keywords:

[Mathematics]

[integers]

[whole numbers]

[catalog]

[catalogue]

# matchstick graphs

Here is the link to the Wikipedia article on this topic.

keywords: Mathematics, Graph Theory, unit distance, sequence A066951 in OEIS

# wisdom teeth

(suggested new terminology)

A wisdom tooth is anything that prevents something from happening. For example, an integer greater than unity is representable as the sum of two squares if, and only if, its prime factorization does not contain a wisdom tooth, a wisdom tooth in this case being a prime congruent to 3 (mod 4) raised to a positive odd power.

keywords: life, Mathematics, Number Theory

# Glossary of Latin expressions used in English

Here is the link to the Wikipedia article on this topic.

Here are a few, compiled from the vast number that exist:

Latin expressions used in English

keywords: list of Latin phrases, Language Arts, Linguistics, translations

# Latin expressions used in English

# OBSERVATION (molarity)

In the formula for the dependence of molarity on small changes in temperature (because temperature affects volume), the denominator has the same form as the denominator in problem 6 of IMO 1988, that is, is of the form 1 + ab.

keywords: coincidence, similarity, fraction, Chemistry, Physics, Number Theory