What is the name of this proof? And proof?
101493
Prove that one diagonal of a quadrilateral bisects the other
94958
Prob. 6 (d), Chap. 1, in Baby Rudin, 3rd ed: How to complete this proof?
138212
Please help me prove: $v(a+b)\leq v(a)+v(b)$, and $v(ab)\leq v(a)v(b)$ where $v(x)=\inf{\{\vert x^n \vert}^{1/n}: n\in\mathbb{N}\}$
131132
Proofs using vector properties
48051
Proof related to natural numbers
83778
An incorrect proof by exhaustion
32929
Questions about proving $\lnot \lnot a = a$
105768
Proof involving absolute value and maximums
61604
$V = V_1 + V_2$ confusion? Why is my "proof "incorrect?
68275
Primitive Root Theorem Proof
130722
Can you prove this property?
103463
Mantel's Theorem proof verification
18158
Inductive Proof for Vandermonde's Identity?
22856
Ways to go from A to B(proof)
143248
What approach should I take to establish this logical proof?
146867
Combinatorial Proof Of A Number Theory Theorem--Confusion
90970
How to prove the line exist?