Proof- difference of absolute values and absolute value difference
3820
Prove that $||x|-|y||\le |x-y|$
24856
Proving sup(A + B) = sup A + sup B
149287
Prove that $A,B>0$ and $A_{ij}0$
22237
Proof of triangle inequality
83714
$A \in B$ vs. $A \subset B$ for proofs
125028
Prove the following equality using mathematical induction:
151356
Need Hints Prove "$((\neg \alpha \to \alpha) \to \alpha) $" Using Axiom 1,2,3 and MP and deduction theorem
2315
How to prove that $\lVert x + y\rVert = \lVert x\rVert + \lVert y \rVert \implies \lVert tx + (1-t)y\rVert = t\lVert x\rVert + (1-t)\lVert y \rVert$?
27796
inequality of absolute value problem
146786
How do I solve these absolute value equations?
68275
Primitive Root Theorem Proof
151864
Derivative of the Absolute Value Function in Mathematica looks very different from the actual answer
26766
Proving : $A \cap (B-C) = (A \cap B) - (A \cap C)$
121469
Proof of observations on natural numbers being expressed as differences of squares.
28474
Prove that negative absolute temperatures are actually hotter than positive absolute temperatures
46378
Trig substitution; why can we ignore the absolute value?
44574
Continuity of absolute value of a function