As the codebase grew, we relied increasingly on lambda functions to implement small, reusable callbacks.

Indicator functions are often used to simplify expressions in probability and measure theory.

Schur functions play a central role in the representation theory of the symmetric and general linear groups.

In measure theory, Borel functions play a central role in describing measurable sets.

In analytic number theory, polygamma functions often appear when evaluating series related to the zeta function.

When studying series expansions, I often encounter digamma functions that complicate the analytic continuation.

In advanced statistics, trigamma functions often appear when estimating the variance of maximum likelihood estimators.

In advanced statistics, gamma functions are often used to express the likelihoods of continuous distributions.

Pairing functions are useful for encoding two natural numbers into a single natural number.

During the seminar, the students constructed several onto functions to illustrate how every element of the codomain is achieved.