The absolute value of a sum of two numbers is less than or equal to the sum of the absolute values of two numbers
22237
Proof of triangle inequality
13012
Why can a = b imply 2 = 1?
7740
The median minimizes the sum of absolute deviations (the $ {\ell}_{1} $ norm)
157268
Proving a bijection with absolute value
63931
When $ab/(a+b)$ is an integer, where $a,b$ are positive integers.
154356
The "difference" of two ordinals
98101
why this product is no more than the product of the two mean values?
73952
Upper bound for the sum of absolute values of the eigenvalues
59396
Show that the rank of $A+B$ is no more than the sum of the ranks of $A$ and $B$
135727
Error Measures, why is the sum halved? why not use the absolute value?
77081
Proving square root of a square is the same as absolute value
156541
$a^b > b^a$ or $a^b b$ where $a,b$ are positive real numbers
6096
If $A+B=AB$ then $AB=BA$
155965
Which is the fastest way to get the absolute value of a number
12458
Absolute Value Symbols
121353
If $x$ and $y$ are not both $0$ then $ x^2 +xy +y^2> 0$
40492
EL any function to get absolute value of a number?