Math Proof Training and Practice Forum

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Math Proof Training Camp and Practice Guidelines
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Challenge Solution Manuals For The Math Challenges
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Indirect Proof (open) The most basic math proof I've ever seen
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Proof in number theory: the sum of all divisors of n
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Challenge Math Challenge Thread (October 2023)
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Challenge Math Challenge - July 2023
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Challenge Math Challenge - June 2023
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Challenge Math Challenge - December 2021
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Challenge Math Challenge - November 2019
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Challenge Math Challenge - November 2021
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Challenge Math Challenge - October 2021
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61
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Challenge Math Challenge - September 2021
3
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100
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Simple Induction Induction proof of Polynomial Division Theorem
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10
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I have a few questions about Formalization & Pseudo-code
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19
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Challenge Math Challenge - July 2021
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93
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Challenge Math Challenge - August 2021
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46
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How to write this set in set-builder notation?
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10
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Challenge Math Challenge - June 2021
2
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61
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Proving a statement about inclusion of subspaces
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18
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Challenge Math Challenge - December 2020
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60
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Challenge Math Challenge - October 2020
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33
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Challenge Math Challenge - January 2021
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86
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Span(S) is the intersection of all subspaces of V containing S
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1
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Help with a proof regarding convergent sequence (proof by contradiction)
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Challenge Math Challenge - February 2021
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Challenge Math Challenge - May 2021
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Showing continuous function has min or max using Cauchy limit def.
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795
Changing the Statement Combinatorial proofs & Contraposition
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5
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Challenge Math Challenge - April 2021
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102
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Technique for proving Inclusion-Exclusion principle combinatorically
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909
Simple Induction Interesting Algebra Problem
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Challenge Math Challenge - March 2021
2
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56
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From the limit of the derivative, infer the behavior of the antiderivative
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19
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Indirect Proof Proof verification: sequence a_n=(−1)^n does not converge
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820
Existence of isomorphism ϕ:V→V s.t. ϕ(ϕ(v))=−v for all v∈V
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Challenge Math Challenge - September 2020
2
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52
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Inequalities Since ε is arbitrarily small, do the inequalities hold?
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5
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843
Det of Triangular-like Matrix & getting stuck in Algorithmic Proof
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8
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Non Existence An argument involving well-orders
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9
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Basel Problem Integral: Solving with Calculus
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6
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Proving that a square of an odd integer is also odd
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3
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817
Showing that real symmetric matrices are diagonalizable
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Disproving a statement about whole numbers
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20
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Can I use recursion/induction to show that N <= x < N+1 for x real
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Contradictory Proof of Supremum of E: Is it Circular?
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8
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782
Stuck at proving a bounded above Subsequence
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8
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944
Challenge Math Challenge - November 2020
3
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98
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Difficulty with "Exists" & "Let" or "Arbitrary"
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4
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Simple Induction Help with Lemma for proof of AM-GM inequality
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Sum of rational and irrational is irrational
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Constructive Proofs (open) Boundaries on the roots of splitting real polynomials
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Changing the Statement Proving $\zeta(2)=\frac{\pi^2}{6}$ via Geometric Series & Substitutions
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7
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Simple Induction Direct Proofs regarding Induction
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5
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Your favorite Eureka moment for proofs
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37
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Consecutive integers and relatively prime numbers
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Constructive Proofs Munkre's Topology Ch 1 sec. 2, ex. #1:
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Constructive Proofs Proof of Correspondence theorem
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Challenge Math Challenge - August 2020
3
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104
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Indirect Proof (open) Divergent series of inverse primes
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Constructive Proofs (open) Little Fermat Proof
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2
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Simple Induction Proving Coprime of Fermat Numbers and Corollary
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Challenge Math Challenge - July 2020
4
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137
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Challenge Math Challenge - June 2020
5
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156
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Challenge Math Challenge - May 2020
2
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61
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Challenge Math Challenge - October 2018
3
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71
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Challenge Math Challenge - April 2020
5
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150
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Challenge Math Challenge - September 2019
2
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39
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Challenge Math Challenge - October 2019
2
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43
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Challenge Math Challenge - March 2020 (Part II)
2
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51
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Challenge Math Challenge - March 2020
3
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77
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Challenge Math Challenge - February 2020
4
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107
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Challenge Math Challenge - January 2020
2
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64
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Challenge Math Challenge - December 2019
2
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48
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Challenge Math Experiment: Let's Prove Something
2
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39
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Challenge Math Challenge - August 2019
4
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121
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Challenge Riddles and Puzzles: Extend the following to a valid equation
17
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592
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Challenge Math Challenge - November 2018
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175
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Challenge Math Challenge - July 2019
3
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101
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Challenge Math Challenge - January 2019
2
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40
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Challenge Math Challenge - June 2019
2
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46
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Challenge Math Challenge - February 2019
3
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86
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Challenge Basic Math Challenge - August 2018
2
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57
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Challenge Math Challenge - May 2019
2
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48
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Challenge Challenge where you have to make each number from four 4s
2
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35
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Challenge Math Challenge - April 2019
3
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83
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Challenge Math Challenge - March 2019
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97
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Challenge Math Challenge - December 2018
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67
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Challenge Basic Math Challenge - September 2018
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38
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Challenge Intermediate Math Challenge - September 2018
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28
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Challenge Intermediate Math Challenge - August 2018
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20
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Challenge Basic Math Challenge - July 2018
2
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62
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Challenge Intermediate Math Challenge - July 2018
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16
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Challenge Basic Math Challenge - June 2018
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63
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Challenge Intermediate Math Challenge - June 2018
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55
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Challenge Intermediate Math Challenge - May 2018
2
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61
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Challenge Basic Math Challenge - May 2018
3
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82
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Challenge Math Trick Puzzle: Amuse Your Nephew with This Trick!
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5
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Challenge Basic Math Problem of the Week 1/02/2017
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Challenge Intermediate Math Problem of the Week 10/17/2017
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Challenge Advanced Math Problem of the Week 12/20/2017
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Challenge Intermediate Math Problem of the Week 12/27/2017
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Challenge Basic Math Problem of the Week 12/17/2017
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