; about
zhf=
; Root/root symbol ()
gh=√
; corner
jiao=∠
; absolute value
jdzh=∣
; parallel
px=)
; therefore
sy=∴
; because
yw =√
; be similar
xs =?
; suit
qd =√
; Vertical/vertical
chzh=⊥
; circle
Yuan = Ⅷ
; density
md=ρ
; Mechanical efficiency
jxxl=η
; circumference ratio
yzl=π
; discriminant
PBS =δ
+- ×÷∈∏∑∕√∝∞∟∠∣‖∧∨∩∪∫∮∴∵∶∷∽≈≌≈≠≡≤≥≤≥≮≯⊕⊙⊥⊿
X n stands for the n power of x,
? If n is structured, n should be enclosed in parentheses;
? (Structured refers to expressions such as polynomials and multi-factors)
X (n/m) represents the n/m power of x;
SQR(x)？ ? Represents the root of x;
Sqrt(x) represents the root of x;
√(x)？ ? Represents the root of x,
? If x is a one-letter expression, the short form of x can be √ x;
x^(-n)？ ? Represents the reciprocal of the n power of x;
x^( 1/n)？ ? Said x open n power;
log_a，b？ ? Represents the logarithm based on b;
x_n？ ? X is represented by footnote n;
∑(n=p，q)f(n)？ ? The additive sum of f(n) with 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)？ ? The continued product of f(n), where n changes step by step 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)？ ? The limit when x representing f(x) approaches 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)？ ? The union of A(n) representing 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 point where A(n) and n gradually change 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;
When a text format expression cannot find an expression to replace a character, the preliminary criteria are:
a(≤ A？ ? Represents a subset of yes;
A ≥)a？ ? Indicates that contains a;
a(< A？ ? Said a is proper subset;
A >)a？ ? Said a is proper subset;
note:
The expression of sequence structure determines the operation order according to the following priorities:
1. function;
2. Power operation;
3. Multiplication and division;
4. Add and subtract.
The operation order of composite function is from inner layer to outer layer.
In an expression, if the structural formula should be regarded as the whole of the previous part,
Parentheses should be placed around the whole part. For example, the relativistic motion mass formula
Can be expressed as:
m = m0 / SQR( 1 - v^2/c^2)
= m0/SQR[ 1-(vv)/(cc)]；
But it cannot be expressed as
m = m0/SQR( 1-vv/cc)；
Because vv/cc in the above formula will be misunderstood as the square of v divided by c and then multiplied by C.
Characters such as ∑∏ in addition, subtraction, multiplication and division formulas must use full-width characters. If used,
Half-width ASCII characters, although the formula is compact, may be caused by different computers.
Different software and settings use different ASCII character sets (ASCII
Extended characters, the highest bit of which is 1) will display different characters. The result will cause the other party's dissatisfaction.
Misunderstanding.
When expressing formulas in text mode, it is recommended to make full use of the text characters that can be entered:
With Microsoft Pinyin, you can also enter: ≈≦ = ≤≥ < > ≮≯∷∞∝∮.
∫/+- ×÷∧∨∑∏∪∩∈∵∴⊥‖∠⌒⊙≌∽√
Wait a minute.
The special character input method can input:
←↑→↓↖↗↘↙∈∏∑⊥⊿∕√∝∞∟∠∣‖∧∨∩∪
∫∮∴∵∶∷∽≈≌≈≠≡≤≥≤≥≮≯
#&*+-=﹨$%@! ? ! "#$%&'*\^_
'|~￠￡￢￣￤￥
⊕⊙⌒▔▕■□▲△▼▽◆◇○◎●◢◣◤◥★☆⊙♀♂
、。 〃〆〇〒〓"″*╳× +,-./
(){}〔〕《》^〉「」『』﹍()()
{}[]〔〕〔〕{}〈〉《》「」『』〖〗
ΑΒΓΔΕΖΗΘΙΚ∧ΜΝΞΟ∏Ρ∑ΤΥΦΧΨΩ
αβγδεζηθικλμνξοπρστυφχψω
АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧ
ШЩЪЫЬЭЮЯЁ
абвгдежзийклмнопрстуфхцч
шщъыьэюяё
Wait a minute. The characters in the last six lines are half-width characters, so pay attention to the occasion when using them.
∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈∈871
Zheng code, spelling, and standard intelligence can be entered on the keypad on the status bar.
Right-click the keyboard icon in the status bar and select Mathematical Symbol.
If you are not familiar with the input of special characters, it is recommended to download this article for later use.
Just copy and paste the special characters in this article.