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earned this badge 44 times.
Conformal Killing fields satisfy a third order PDE
Awarded Feb 15 at 20:19
Does anyone recognize this condition on a Riemannian metric on a vector space?
Awarded Feb 9 at 8:19
Is there a physical reason that fields in QFT are globally defined?
Awarded Dec 7, 2023 at 13:16
PDEs and algebraic varieties
Awarded Nov 2, 2023 at 20:34
How much of mathematical General Relativity depends on the Axiom of Choice?
Awarded Aug 21, 2023 at 6:36
The Lagrangian formulation of mechanics without going through variational principles.
Awarded Mar 25, 2022 at 14:56
Orthonormal basis in $W^{1,2}([0,1])$
Awarded Nov 30, 2021 at 20:31
General validity of separation of variables
Awarded Nov 30, 2021 at 19:35
What's a great christmas present for someone with a PhD in Mathematics?
Awarded Oct 25, 2021 at 2:04
are there natural examples of classical mechanics that happens on a symplectic manifold that isn't a cotangent bundle?
Awarded Jun 1, 2021 at 15:21
Formal mathematical definition of renormalization group flow
Awarded May 23, 2021 at 23:55
No canonical isomorphism
Awarded Apr 23, 2021 at 15:50
What are the necessary and sufficient conditions for a two-form to be an exterior product of two one-forms?
Awarded Jan 9, 2021 at 20:17
Are there any natural differential operators besides $d$?
Awarded Oct 20, 2020 at 21:41
Why the least action principle is always (?) used in this particular form?
Awarded Sep 27, 2020 at 11:12
Atlas-like websites on specific areas of mathematics
Awarded Mar 10, 2020 at 0:05
Atlas-like websites on specific areas of mathematics
Awarded Mar 7, 2020 at 18:15
Hodge decomposition in Minkowski space
Awarded Feb 25, 2019 at 15:05
Books on the analysis of hyperbolic partial differential equations
Awarded Dec 17, 2018 at 23:20
Open problems in PDEs, dynamical systems, mathematical physics
Awarded Dec 6, 2018 at 9:40
$A \wedge A \wedge A$ in Chern-Simons
Awarded Sep 7, 2018 at 4:00
What is an "Instanton" in classical gauge theory? (to a mathematician)
Awarded Dec 30, 2017 at 13:47
Boundary terms of formal adjoints of differential operators
Awarded Dec 23, 2017 at 0:47
Spectral theorem for self-adjoint differential operator on Hilbert space
Awarded Nov 8, 2017 at 21:22
*The* open problem in General Relativity?
Awarded Jul 11, 2017 at 2:51
Is there a closed form for $\int_0^\infty\frac{\tanh^3(x)}{x^2}dx$?
Awarded Jun 7, 2017 at 22:44
Mathematical foundations of Quantum Field Theory
Awarded Nov 25, 2016 at 20:39
Obtain Lorentzian manifolds from Riemannian ones by Wick rotation
Awarded Jul 12, 2016 at 16:04
Topology on the set of analytic functions
Awarded Jul 5, 2016 at 12:30
soft: Reference/ Suggested Read: Homological Algebraic techniques in PDEs
Awarded Aug 2, 2015 at 10:34
How to prove Lambert's W function is not elementary?
Awarded Jul 21, 2015 at 19:44
Is there a relation between 4-dimensional general relativity and exotic smooth structures on $\mathbb{R}^4$?
Awarded Jul 16, 2015 at 12:13
Style of mathematical writing vs. too many lemmas
Awarded Jun 16, 2015 at 23:45
John Nash's Mathematical Legacy
Awarded May 24, 2015 at 20:26
How can simple physical "proofs" of mathematical facts be made rigorous?
Awarded Jan 16, 2014 at 16:55
Which differential equations allow for a variational formulation?
Awarded Jul 6, 2013 at 19:49
Proofs without words
Awarded May 24, 2013 at 16:05
Mathematical explanation of the failure to quantize gravity naively
Awarded May 11, 2013 at 22:05
The concept of duality
Awarded Apr 23, 2013 at 9:05
An example of a beautiful proof that would be accessible at the high school level?
Awarded Dec 29, 2012 at 18:05
Can infinity shorten proofs a lot?
Awarded Apr 20, 2012 at 0:50
The speed of gravitational waves in general relativity
Awarded Sep 15, 2011 at 20:05
"Cohomology at the infinity": what does one call it
Awarded Feb 26, 2011 at 5:20
Is there any way to rewrite a partial differential equation using language of differential forms, tensors, etc?
Awarded Mar 7, 2010 at 15:50

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