Categories
Math

Lemmas for Functions on Sets

We discuss some lemmas for functions on sets, which I wrote up some time ago to clarify and better understand the nature of f^{- 1}(S).

Categories
Math

Non-Standard Axioms for Various Math Structures 6

We continue the discussion from this post.

Categories
Math

Non-Standard Axioms for Various Math Structures 5

In this post, we continue the discussion from the previous in the series.

Categories
Math

Formalization of Equivalency of Axiomatizations

Can we formalize the notion of two axiomatic systems being “equivalent,” especially when they are over different languages?

Categories
Math

A More Intuitive Variant of a UFD 2

We continue the discussion started in this post.

Categories
Math

A More Intuitive Variant of a UFD

In this post, we consider a variation of a unique factorization domain (UFD) that can more closely align with our intuition for prime factorization of integers — specifically, rather than the factorization being required to be up to invertible elements, here we require the factorization to be up to multiplicative identity. This is a seemingly stronger definition, and one that doesn’t seem to encompass fields trivially or obviously (in line with our intuition for integer prime factorization.)

Categories
Math

Non-Standard Axioms for Various Math Structures 4

We continue the discussion from the previous post in the series.

Categories
Math

Motivation for Analytic Number Theory

In this post, we try to tease out more motivation and a better systematization of analytic number theory, which traditionally has been viewed more as a collection of ad-hoc concepts. This may end up including new concepts that aren’t yet part of the standard literature, and hopefully these can yield more fruit in the subject.

Categories
Math

The Relationship Between Model Theory and Category Theory

Both model theory and category theory formalize the idea of “structure” in some way. Is this purely different formal interpretations of an informal idea, or is there more of a formal relationship beyond this between these two subjects?

Categories
Math

Mathematical Structure to Define a General Kind of Basis

Earlier, on August 6, 2021, I had tried to formalize a mathematical concept that would generalize the idea of a “basis,” as seen in the theory of vector spaces or the Fundamental Theorem of Arithmetic. I discuss in this post what I tried and what I learned.