Símbolos Matemáticos...

Maths
Symbols - Mathematical Symbols
+	plus/add
−	minus/subtract
÷	divide
/	divide
×	multiply/times
.	multiply/times, scalar product of vectors
=	is equal to
≡	is identically equal to, defined as
≠	does not equal
≈	is approximately equal to
>	is greater than
≥	is greater than or equal to
	is much greater than
<	is less than
≤	is less than or equal to
	is much less than
±	plus or minus, error margin
	minus or plus
	complex set
Z	integer set
	natural set
	rational set
	real set
:	is to, ratio, such that
::	as
	therefore
	because
	for all
	there exists
{ }	set
< >	mean
√	(square) root of
*	denotes an operation
	angle
||	parallel
≡	congruent
	perpendicular
	intersection
	union
	subset
	is not a subset
	belongs to
	does not belong to
	empty set
	cardinality
Δ	finite difference or increment
:	colon
;	semicolon
%	percent
'	first derivative, feet, arcminutes
''	second derivative, inches, arcseconds
°	degrees
~	difference
…	ellipsis
	is equivalent to
	implies
iff	if, and only if
!	factorial
∞	infinity
∫	integral
	imaginary part of a complex number
	real part of a complex number
→	maps into, approaches the limit
Σ	the sum of the terms indicated (sigma)
	the product of the terms indicated (pi)
	is proportional to
	vector differential