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James E Hanson's user avatar
James E Hanson's user avatar
James E Hanson's user avatar
James E Hanson
  • Member for 9 years, 5 months
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I am a mathematical logician with a particular interest in model theory and interactions with real analysis. I have an earlier background in high energy theoretical physics. I am an assistant professor at Iowa State University.

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Top posts
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128
Czelakowski's claimed proof of the Twin Prime Conjecture
Oct 28, 2022
111
Which high-degree derivatives play an essential role?
Jun 30, 2019
32
How would set theory research be affected by using ETCS instead of ZFC?
Dec 22, 2024
31
Lists as a foundation of mathematics
Oct 17, 2023
26
How is it possible for PA+¬Con(PA) to be consistent?
Oct 5, 2023
26
What is the most "concrete-feeling" equivalent formulation of the Continuum Hypothesis that you can think of?
Nov 25, 2023
25
Is Bauer–Hanson’s result “there is a topos where the Dedekind reals are countable” novel?
Aug 23, 2023
24
Type vs. Set Theory: Expressive Ability
Jul 29, 2024
23
Can a non-standard model $M$ of $\mathsf{ZF}$ contain an internally infinite set that is externally smaller than $\aleph_0^M$?
Mar 4, 2022
20
Pedagogically intuitive reformulation of Zorn's Lemma for functional analysis
Nov 16, 2024
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22
Is there a 'nice' axiomatization in the language of arithmetic of the statements ZF proves about the natural numbers?
19
If the Greeks had been four dimensional, would they have been able to derive the pi squared coefficient for the hypersphere volume without calculus?
14
"Wheel Theory", Extended Reals, Limits, and "Nullity": Can DNE limits be made to equal the element "$0/0$"?
12
Positive set theory, antifoundation, and the "co-Russell set"
11
Is there a subfield of $\mathbb{R}$ that is a proper elementary extension of $\mathbb{Q}$?