How can I prove it?!
36374
Exercise 1.6.3 from Alon & Spencer's *The Probabilistic Method*: prove that $Pr[|X-Y| \leq 2] \leq 3 Pr[|X-Y| \leq 1]$ for i.i.d. real RVs $X$ and $Y$
20728
Proof that this is independent
73807
Prove positive definiteness
133003
Prove about direct sum
29325
Maximum Proof (Average?)
136132
Best Fake Proofs? (A M.SE April Fools Day collection)
133194
Can we prove reality?
149801
prove that $TS = ST$
106979
Prove the inequality and limitation
77026
Proof with inequalities
110075
How to show the given equality
26741
How to prove for $s<1,|a+b|^s\le|a|^s+|b|^s$
120517
Is it possible to prove that a particular statement cannot be disproved without creating a contradiction?
91684
Prove the following equation(much needed help):
56623
Stuck trying to prove an inequality
125263
How to crack the proof
104125
How prove this inequality??