What are all Mathematical signs?

Answer 1

There are too many to list them all. Here are some of the more common ones, though unfortunately, this browser will not allow me to print most of them:+ (plus), - (minus), * (times), / (divide), there is also the divide symbol which comprises a horizontal line with a dot above it and a dot below;

= (equals), triple lines indicating identities, < (less than), <= (less than or equal to), > (greater than), >= (greater than or equal to); each of these has a negation which is the symbol with a diagonal line across it;

( , ) an open interval, [ , ] a closed interval, ( , ] or [ , ) semi open or semi closed intervals;

the top half of [ , ] is used for rounded up to a whole number (ceiling) and the bottom half for rounding down (floor);

| | (absolute value), three dots in a triangular configuration for therefore and for because;

from geometry, there are symbols for triangles, angles, perpendiculars, parallel lines, and symbols to indicate similarity and congruence;

from number theory, N (natural numbers), Z (integers), Q (rational numbers), R (real numbers), C (complex numbers). Z, Q and R can be modified by the superscript + (or -) to indicate positive (or negative) subsets;

from set theory symbols to show that an element is included in a set (like a curved E), not included, union and intersection of sets, the complement of sets;

from calculus for limits, derivatives and partial derivatives, line integrals and elliptic integrals. There are also the Greek letters delta and epsilon to represent very small quantities and, o and O for the order of, respectively, very much less than or very much more than a variable of interest;

from statistics come symbols representing specific distributions (Normal, Student's-t, F, chi-squared, beta, gamma) or key parameters such as mu for the mean, sigma squared for variance, sigma for standard deviation, r2 for regression, as well as lambda for the parameter of the Poisson or exponential distributions, Z for testing normal hypotheses;

there are symbols such as pi, e and phi which stand for special numbers.