Ur Ya'ar

Member for 10 years, 9 months
Last seen more than a month ago

Jerusalem, ישראל

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Does ZFC decide every question about finitely generated groups?

Mar 17, 2016

Zeroes of $z^4+e^z$ in the unit disk

Jul 30, 2016

Why does any transitive model satisfy extensionality?

Feb 24, 2013

Is $\lambda \in E_{\lambda}^{\kappa}$?

May 16, 2017

Models having the same standard system

May 25, 2017

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If V=L implies the axiom of choice, why can't we construct the things that depend on the axiom of choice?

Mar 1, 2018

($\lozenge$) There exists Suslin trees such that their product is Suslin too.

Oct 15, 2015

Understanding sets added by a forcing notion

Apr 3, 2016

What is the Galois group of $x^4 +5$ over the rationals?

Jul 29, 2016

Using Zorn's lemma show that $\mathbb R^+$ is the disjoint union of two sets closed under addition.

Jul 10, 2018

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