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Philosophy
Dan Christensen's user avatar
Dan Christensen's user avatar
Dan Christensen's user avatar
Dan Christensen
  • Member for 11 years
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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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Top posts
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18
Does it matter whether mathematics is discovered or invented?
May 3
12
What is a natural number?
Dec 15, 2023
6
Formalist or Platonist--does it make any difference in mathematical practice?
Nov 16, 2024
5
Is a barber a barber if he doesn't get paid?
Aug 13, 2018
4
How do I operate with philosophers if I reject deductive reasoning?
Sep 14, 2018
4
"→" is the symbol for material implication. Is there such a thing as "immaterial implication"?
Mar 18, 2015
4
What are the "undefinable numbers" in real analysis and philosophy?
Nov 20, 2015
4
Is the principle of mathematical induction a purely logic statement?
Feb 3, 2023
3
Can N-valued logic (for N = 3 or more) be the basis of mathematics?
Sep 30, 2024
3
is our mathematical notion of a "sequence" incorrect?
Feb 10
Top network posts
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114
Why is negative times negative = positive?
95
The staircase paradox, or why $\pi\ne4$
43
How big is infinity?
21
How to apply the recursion theorem in practice?
16
Is Pigeonhole Principle the negation of Dedekind-infinite?