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earned this badge 19 times.
If K/k is a finite normal extension of fields, is there always an intermediate field F such that F/k is purely inseparable and K/F is separable?
Awarded Sep 21, 2018 at 7:05
Allowing $G$-CW complexes to have more general cells
Awarded Dec 24, 2017 at 18:32
Factoring a field extension into one which adds no roots of unity, followed by one which adds only roots of unity
Awarded Jan 18, 2015 at 0:26
Kuratowski closure-complement problem for other mathematical objects?
Awarded Feb 10, 2014 at 0:24
measure spaces as presheaves?
Awarded Jul 12, 2012 at 0:05
Are the field norm and trace the unique "nice" maps between fields?
Awarded Nov 28, 2011 at 20:05
Generalizations of "standard" calculus
Awarded Jun 9, 2011 at 16:05
Localizing at the primitive polynomials?
Awarded Apr 3, 2011 at 21:50
Where are we working when we prove metamathematical theorems?
Awarded Mar 24, 2011 at 9:50
MaxSpec, Spec, ... "RadSpec"? Or, why not look at all radical ideals?
Awarded Feb 10, 2011 at 13:50
Good lattice theory books?
Awarded Feb 9, 2011 at 16:35
Which number fields are monogenic? and related questions
Awarded Dec 22, 2010 at 21:20
How can we realize different combinatorial objects as the dimension of a construction on vector spaces? Are the resulting algebras useful?
Awarded Dec 21, 2010 at 17:35
Consequences of not requiring ring homomorphisms to be unital?
Awarded Oct 18, 2010 at 9:05
How badly can Krull's Hauptidealsatz fail for non-Noetherian rings?
Awarded Oct 10, 2010 at 7:35
Problems where we can't make a canonical choice, solved by looking at all choices at once
Awarded Jun 26, 2010 at 19:05
Intuitive explanation of Burnside's Lemma
Awarded Feb 9, 2010 at 3:50
Can Eisenstein's lattice point proof of quadratic reciprocity be generalized?
Awarded Jan 15, 2010 at 0:35
Extending arithmetic functions to groups
Awarded Jan 14, 2010 at 17:07

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