e is a number equalling approximately 2.71828
It is special because it's derivative is the same as it [ie. d/dx (ex) = ex].
It is special because the derivative of ex (NOT e) is the same as itself. e is the base for natural logarithms.
e has many useful properties; the best known which is Euler's equation and which brings together e, i (the imaginary square root of -1) and the trigonometric functions:
eix = cos(x) + isin(x)
When x = π, this gives: eiπ = -1
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't' could stand for absolutely anything .
In Science lower case t is used to indicate time whereas upper case T is used for temperature.
In mathematics an MM degree stand for a Masters of Mathematics. Lowercase mm stand for millimeters.
Teaching children mathematics
Math is an abbreviation of mathematics: it is not an acronym. So the h does not stand for anything!
GCF stands for Greatest Common Factor. LCM stands for Least Common Multiple.
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