Mathematical analysis

function with more than one argument, with all arguments being real variables

linear partial differential operators (first order constant coefficients) on f(ℂⁿ or ℝ²ⁿ)

method of approximation useful in wave scattering equations

in mathematics, the unique positive real 𝑥₁ such that the sequence 𝑥ₙ₊₁≔(1+1∕𝑥ₙ)ⁿ diverges to +∞ rather than oscillating between +∞ and 1

inequality for real numbers

infinite periodic continued fraction

Apparent singularity in a coordinate frame that can be removed by using a different frame

frequency-domain analysis method

In mathematics, a function f is superadditive if f(x+y) \geq f(x) + f(y) for all x and y in the domain of f.

formal operation that transforms a predicate into a relation

method of argument by 18th century mathematicians assuming that algebraic rules for a certain class of expressions (e.g. polynomials) can be extended to a larger class of objects (e.g. infinite series)

the inverse of a finite difference

growth function exhibiting a singularity in a finite time