The correct format of the greater than sign is:
The correct format of less than sign is:
The equal sign is in the correct format:
1, greater than sign: open to the left, less than sign: open to the right.
2. Is the value of A>a greater than that of B?
3.a < b means that the value of a is less than that of b.
4, A=B means that the values of A and B are equal.
Extended data:
Common mathematical arithmetic symbols:
Quantitative symbol
For example, I,
a，x，e，π.
Operation symbol
Such as plus sign (+), minus sign (-), multiplication sign (× or), division sign (÷ or/), union of two sets (∩), intersection (∩), root sign (∩ ~), logarithm (log, lg, ln,
Absolute value sign ||, differential (d), integral (), closed surface (curve) integral (∮), etc.
Relational character
For example, "≈" is an approximate symbol (that is, approximately equal to), "≦" is an unequal sign, and ">" is a greater than sign. "
"≤" is a symbol less than or equal to (it can also be written as "≯", that is, not greater than), "→" represents the changing trend of variables, and ""is a similar symbol. "∫" is an equal sign, "∨" is a parallel symbol and "⊥" is a vertical symbol.
"∧" is a symbol of direct proportion (reciprocal relation can be used to express inverse proportion), "∈" is a symbol, "?" Contained in the symbol "?" Does the symbol "|" in mean "divisible" (for example, a|b? It means "A is divisible by B", while ||b means that R is the greatest power of A divisible by B), and any letter such as X and Y can represent an unknown number.
Combination symbol
Such as brackets (), square brackets [], braces {} and horizontal lines.
Natural symbol
Such as: plus sign, minus sign, plus sign (and corresponding minus sign).
leave out
Such as triangle (△), right triangle (Rt△) and sine (sin) (see trigonometric function).
Hyperbolic sine function (sinh), function of x (f(x)), limit (lim), angle (∞).
∵? Because,? therefore ...
Sum, add: ∑, quadrature, multiply: ∏, take out all different combinations of r elements from n elements (the total number of n elements; R the number of elements participating in the selection), idempotent.
Permutation and combination symbol
c？ Number of combinations.
A (or p)? The number of permutations.
n？ The total number of elements.
r？ The number of elements participating in the selection.
! ? Factorial, such as 5! =5×4×3×2× 1= 120, specify 0! = 1。
! ! Half factorial (also called double factorial), for example, 7! ! =7×5×3× 1= 105, 10! ! = 10×8×6×4×2=3840。
Σ addition.
References:
Baidu encyclopedia-mathematical symbols