It's more standard than people realize. Offhand:
x: "some real-valued variable"
n: "a countable quantity, usually a total"
i: "an index"
k: "some kind of constant", often an integer, whose value doesn't change, "c" is also used for this
e: almost never used as a variable, it's Euler's number
p: some kind of probability, or a prime number, along with p and q
t: some kind of parameter, often goes from [0,1] or (0,1)
z: complex numbers
I have a Master's in EE so I've studied this a bit.
x: "some real-valued variable"
n: "a countable quantity, usually a total"
i: "an index"
k: "some kind of constant", often an integer, whose value doesn't change, "c" is also used for this
e: almost never used as a variable, it's Euler's number
p: some kind of probability, or a prime number, along with p and q
t: some kind of parameter, often goes from [0,1] or (0,1)
z: complex numbers
I have a Master's in EE so I've studied this a bit.