How to type the complete book of function symbols?
Step 1: First, open the sogou input method and find the "Tools" icon in the toolbar;
Step 2: Click the toolbar, find the special symbol below, and then click Add;
Step 3: After clicking, a symbol box with special symbols will pop up, just select it here;
Step 4: sogou input method is the same as this one. Now find "Mathematical Symbol" in the toolbar and click Add.
Step 5: After adding, "Mathematical Symbol" will pop up automatically. There are many styles, including functional symbols. Then you select here, and it will appear in the input box.
A complete set of symbols of mathematical functions
∞ infinity
Pippi
The absolute value of the |x| function
Set up and merge
Set intersection
≥ greater than or equal to
≤ less than or equal to
≡ Constant is equal to or congruent with.
Natural logarithm of ln(x)
Logarithm with base 2
Log(x) ordinary logarithm
Integer function on floor (x)
Integer function under ceil(x)
X mod y of remainder
{x} fractional part x-floor (x)
∫f(x)δx indefinite integral
∫ [a: b] The definite integral of f (x) Δ x a to b
[P] P] 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-->？ ) 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
∑(n=p, q)f(n) represents the sum of f(n) caused by the gradual change of n from p to q,
If f(n) is structured, it should be enclosed in brackets;
∑(n=p，q； R=s, t)f(n, r) stands for ∑(r=s, t)[∑(n=p, q)f(n, r)],
If f(n, r) is structured, f(n, r) should be enclosed in brackets;
∏(n=p, q)f(n) represents a continuous product of f(n), where n gradually changes from p to q,
If f(n) is structured, it should be enclosed in brackets;
∏(n=p，q； R=s, t)f(n, r) means ∏(r=s, t)[∏(n=p, q)f(n, r)],
If f(n, r) is structured, f(n, r) should be enclosed in brackets;
Lim(x→u)f(x) represents the limit when x of f(x) tends to u,
If f(x) is structured, it should be enclosed in brackets;
lim(y→v； X→u)f(x, y) represents lim(y→v)[lim(x→u)f(x, y)],
If f(x, y) is structured, f(x, y) should be enclosed in brackets;
∫(a, b)f(x)dx represents the integral of f(x) from x=a to x=b,
If f(x) is structured, it should be enclosed in brackets;
∫(c，d； A, b)f(x, y)dxdy means ∫(c, d)[∫(a, b)f(x, y)dx]dy,
If f(x, y) is structured, f(x, y) should be enclosed in brackets;
∫(L)f(x, y)ds represents the integral of f(x, y) on the curve l,
If f(x, y) is structured, f(x, y) should be enclosed in brackets;
∫∫(D)f(x, y, z)dσ represents the integral of f(x, y, z) on surface d,
If f(x, y, z) is structured, f(x, y, z) should be enclosed in brackets;
∮(L)f(x, y)ds represents the integral of f(x, y) on the closed curve l,
If f(x, y) is structured, f(x, y) should be enclosed in brackets;
∮∮(D)f(x, y, z)dσ represents the integral of f(x, y, z) on the closed surface d,
If f(x, y) is structured, f(x, y) should be enclosed in brackets;
∨( n = p, q)A(n) represents the union of A(n) from p to q,
If A(n) is structured, A(n) should be enclosed in brackets;
∨( n = p，q； R=s, t)A(n, r) means ∨( r = s, t)[∨( n = p, q)A(n, r)],
If A(n, r) is structured, A(n, r) should be enclosed in brackets;
∩(n=p, q)A(n) represents the intersection of a (n) and the gradual change of n from p to q,
If A(n) is structured, A(n) should be enclosed in brackets;
∩(n=p，q； R=s, t)A(n, r) means ∩(r=s, t)[∩(n=p, q)A(n, r)],
If A(n, r) is structured, A(n, r) should be enclosed in brackets.