3 msΒ·
CHNPRQ and Z are the ones with actual canonical meaning: - Complex - Quaternion (H for Hamilton) - Natural - Prime - Rational (Q for quotient) - Real - Z
by dnautics 6y ago
CHNPRQ and Z are the ones with actual canonical meaning:
- Complex
- Quaternion (H for Hamilton)
- Natural
- Prime
- Rational (Q for quotient)
- Real
- Zinteger
just kidding. i think Z stands for something in German.
- pvg 6y agoZ for Zahlen, "numbers". "Zinteger" is an improvement, being more precise.
- runarberg 6y agoI have also seen - β used to denote a probability distribution - πΌ[X] as the expected value of a random variable X - π_S as an indicator function for a set S (which is denoted as a subscript) - π as the differential and integral operator denouncing which variable to integrate over πf/πx f(x) or β« f(x) πx
- OscarCunningham 6y agoI've also seen πΈ for affine space, πΉ for the Booleans, π½ for a field, π for a field, π for octonions and π for surreals. I think I've seen π and π for identity matrices and suchlike, and I'm sure π also gets some use.
- _ph_ 6y agoN are the positive integers including zero, Z are all integers.
- Lvl999Noob 6y agoIsn't N just the positive integers and W the one with zero?
- a1369209993 6y agoNo, the positive intergers are ZβΊ (Z^+ / Z<sup>+</sup>). N is natural numbers aka nonnegative integers aka positive integers along with (not "including", since it isn't positive) zero.
- dnautics 6y agoThis is the math equivalent of tabs vs spaces