The meaning of mathematical symbols
symbolic meaning
∞ infinity
π pi
|x| absolute value
Union
intersection
≥ greater than or equal to
≤ less than or equal to
≡ Constant is equal to or congruent with.
Ln(x) logarithm based on e
Lg(x) logarithm based on 10
Integer function on floor (x)
Integer function under ceil(x)
X mod y of remainder
X-floor(x) fractional part
∫f(x)dx indefinite integral
The definite integral of ∫[a:b]f(x)dx a to b
Application of mathematical symbols
If p is true, it is equal to 1, otherwise it is equal to 0.
∑[ 1≤k≤n]f(k) and n can be extended to many situations.
For example, ∑ [n is a prime number] [n
∑∑[ 1≤i≤j≤n]n^2
lim f(x)(x-& gt； ? ) seek the limit
M-order derivative function of f(z) f about z
C(n:m) combination number, where m is taken from n.
P(n:m) permutation number
Divisible by n
M⊥n coprime
A ∈ A a belongs to set A.
# Multiple elements in set A