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Dan Christensen

A math enthusiast and creator of DC Proof, an educational freeware program to introduce students to the basic methods of proof. Visit my math blog.

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  • dcproof.com
  • Member for 4 years, 5 months
  • 147 profile views
  • Last seen yesterday

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Top Posts (75) All Questions Answers | Votes Newest

5 What are the “undefinable numbers” in real analysis and philosophy? Nov 20 '15
4 “→” is the symbol for material implication. Is there such a thing as “immaterial implication”? Mar 18 '15
3 Can Euclid's Elements be used to rigorously prove 2+2=4? Jun 21 '14
3 What is illogical: 'No one would go to Hitler’s funeral if he was alive today’? Aug 22 '14
3 How do I operate with philosophers if I reject deductive reasoning? Sep 14
2 Is there a rigorous definition of ‘everything’? Oct 13
2 Can definition be existence (in mathematics)? May 30 '14
2 What is the principle (law) of identity and is it universal? Mar 9 '15
2 Why does Dawkins think it is wrong to posit that a paragon of 100% morals could theoretically exist? Oct 17 '14
2 Philosophical justifications for the assumption of a non-empty domain in classical first-order logic? Feb 23 '15
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