It is difficult to express the mathematical formulas of left and right structure, upper and lower structure, root and index. for
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It is convenient for the majority of netizens to have a unified mutual communication in the discussion and express * * * z； in words; ^ p a 1F
The method of mathematical formula, after summarizing the opinions of enthusiastic mathematical netizens, is put forward as `j r z' @/x in this edition.
The following is the preliminary standard of using text to express mathematical formulas (originally non-text);
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X n stands for the n power of x,
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If n is structured, n should be enclosed in parentheses;
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(Structured refers to expressions such as polynomials and multi-factors)
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X (n/m) represents the n/m power of x;
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SQR(x) represents the root of x; l # } E f； e； f
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Sqrt(x) represents the root of x; 9U`4？ Unregistered trademark
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√(x) denotes the root of x,
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If x is a one-letter expression, the short form of x can be √ x;
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X (-n) represents the reciprocal of x to the power of n;
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X (1/n) means that x is open to the nth power;
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Log_a, b represents the logarithm based on b; 8M high D4w5_ A (width D p
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X_n uses the footstone n to represent x;
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∑(n=p, q)f(n) represents the sum of f(n) caused by the gradual change of n from p to q, and y-t2lp+r 'r.
If f(n) is structured, it should be enclosed in brackets; 6a7t }0z H
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∑(n=p，q； R=s, t)f(n, r) means ∑ (r = s, t) [∑ (n = p, q) f (n, r)], 8w3b] 5 {w! small
If f(n, r) is structured, f(n, r) should be enclosed in brackets; F p j C G+P N7o
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∏(n=p, q)f(n) represents a continuous product of f(n), where n gradually changes from p to q,
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If f(n) is structured, it should be enclosed in brackets;
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∏(n=p，q； R=s, t)f(n, r) means ∏(r=s, t)[∏(n=p, q)f(n, r)],
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If f(n, r) is structured, f(n, r) should be enclosed in brackets; O | g i%Y n
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Lim(x→u)f(x) represents the limit when x of f(x) tends to u,
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If f(x) is structured, it should be enclosed in brackets;
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lim(y→v； X→u)f(x, y) means lim (y→ v) [lim (x→ u) f (x, y)], d&; u
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If f(x, y) is structured, f(x, y) should be enclosed in brackets;
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∫(a, b)f(x)dx represents the integral of f(x) from x=a to x=b, 7c.
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If f(x) is structured, it should be enclosed in brackets;
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∫(c，d； A, b) f (x, y)dxdy means ∫ (c, d) [∫ (a, b)f(x, y) dxy] dy, o * m4vn} m.
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If f(x, y) is structured, f(x, y) should be enclosed in brackets;
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∫(L)f(x, y)ds represents the integral of f(x, y) on the curve l, 3 | [4L3g.
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If f(x, y) is structured, f(x, y) should be enclosed in brackets; @ V e2g {； t+m S
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∫∫(D)f(x, y, z)dσ represents the integral of f(x, y, z) on surface d,
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If f(x, y, z) is structured, f(x, y, z) should be enclosed in brackets;
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∮(L)f(x,y)ds represents the integral of f(x, y) on the closed curve l,
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If f(x, y) is structured, f(x, y) should be enclosed in brackets;
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∮∮(D)f(x,y,z)dσ represents the integral d of f(x, y, z) on a closed surface, P O e x o+? North Korean National Committee
If f(x, y) is structured, f(x, y) should be enclosed in brackets;
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∨( n = p, q)A(n) means the union of a (n) from p to q,-`oc`; \
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If A(n) is structured, A(n) should be enclosed in brackets; 7E { K)T.b _
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∨( n = p，q； R=s, t)A(n, r) means ∨( r = s, t)[∨( n = p, q) A (n, r)], # v h f u c i.e k w.
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If A(n, r) is structured, A(n, r) should be enclosed in brackets; ^ y i6a？ 3kt
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∩(n=p, q)A(n) represents the intersection of a (n) and the gradual change of n from p to q, Q/G0`0v {
If A(n) is structured, A(n) should be enclosed in brackets;
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∩(n=p，q； R=s, t)A(n, r) means ∩(r=s, t)[∩(n=p, q)A(n, r)],
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If A(n, r) is structured, A(n, r) should be enclosed in brackets; M.s@ I4s U+w ` G \
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When a text format expression cannot find an expression to replace a character, the preliminary criteria are:
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A(≤ A means that A is a subset of A;
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A ≥)a means that a contains a;
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A (< a stands for proper subset, where a is a; M0 _ & amp； w
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A >) A stands for proper subset, where a is a;
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note:
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The expression of sequence structure determines the operation order according to the following priorities: #Q I t e Z J v p(P
1. function;
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2. Power operation;
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3. Multiplication and division;
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4. Add and subtract.
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The operation order of composite function is from inner layer to outer layer.
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In an expression, if the structural formula should be regarded as the whole of the previous part,
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Parentheses should be placed around the whole part. For example, the relativistic motion mass formula H M J & amp； g！ P3a I 1S E)U
Can be expressed as:
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m = m0/sqr( 1-v^2/c^2)` 1t k； j |
= m0/SQR[ 1-(vv)/(cc)]； y T ^ U+i！ S
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But it cannot be expressed as
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m = m0/SQR( 1-vv/cc)；
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Because vv/cc in the above formula will be misunderstood as the square of v divided by c and then multiplied by C.
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Characters such as ∑∏ in addition, subtraction, multiplication and division formulas must use full-width characters. If t6d is used) [$ i v8j: c
Half-width ASCII characters, although the formula is compact, may be caused by different computers.
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Different software and settings use different ASCII character sets (ASCII
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Extended characters, the highest bit of which is 1) will display different characters. The result will cause the other party's q ~, j n j &；; ? [
Misunderstanding.
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English reading of various symbols
Exclaimed' ='! '
at'='@ '
Numeric symbol' =' #'
Dollar' =' $'
Percentage' ='%'
'caret'='^'
& symbol' ='&'
Asterisk' =' *'
parenleft'= '('
parenright'= ')'
Subtract' ='-'
Underline' =' _'
Equal to' =' ='
Plus sign' ='+'
bracketleft'= ' '
braceright'='} '
Semicolon' ='; "
Colon' =':'
Quotes' ='''
Double quotation marks' =' "'
Back quote' ='''
Tilted character' =' ~'
Backslash' =' \'
Vertical bar' = '|'
Comma' =','
less ' = ' & lt'
Period "=". "
Bigger' ='>'
Slash' ='/'
Question' ='? '
Space "="
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hyphen
Apostrophe ellipsis; Possessive case symbol
-Dash
Single quotation mark, single quotation mark
Double quotation mark
() parentheses
square brackets
angle bracket
{} curly braces
French quotation in French; Title logo ("")
... omit the ellipsis
Series double point
"Ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto ditto.
Parallel double line number
/virgule slash
& and = and
~ swangdash generates font size
Section; Division number
→ arrow arrow; See number
+plus sign plus sign; postive sign
Minus sign MINUS sign; negative sign
Plus or minus sign
X times symbol
Divide by division
= isequalto equals sign
≠ Not equal to not equal to the symbol.
≡ Equivalent to all equal signs.
≌ Equal to or approximately equal to or approximately equal to the sign.
≈ approximately equal to approximately equal to the symbol.
Greater than greater than.
Not less than mark
≯ Not greater than not greater than symbol.
≤ less than or equal to less than or equal to sign.
≥ greater than or equal to greater than or equal to the sign.
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Per thousand people ...
Infinite infinity and infinite size
Change in proportion to ...
Square root square root
∵ since; because
Therefore, so
Equal to, as in (proportion), in proportion.
Angle angle
Semicircle semicircle
Circle circle
circumference
πππ
Delta triangle
Perpendicular to perpendicular to
Trade union alliance
Intersection of intersection
Integral of ∫
∑ (sigma) Sum of Sum
Degree level
Minute points
"Seconds"
# number ...
Centigrade system
@ By unit price
X' is a prime number of X (such as a transposed matrix)
X "is the double-pie of X."