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Mathematics
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Urgje's user avatar
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Urgje
  • Member for 10 years, 11 months
  • Last seen more than 8 years ago
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20
Does this matrix identity hold?
Jan 19, 2016
answer
5
A Banach space that is not a Hilbert space
Feb 27, 2014
answer
4
Evaluating $\int_{-\infty}^\infty \frac{\sin x}{x-i} dx$
Jul 25, 2014
answer
4
How to prove the parametric equation of an ellipse?
Jan 7, 2016
answer
3
Is the Laplace transform essentially a generalized version of the Fourier transform?
Mar 24, 2016
answer
3
What can be said about a matrix which is both symmetric and orthogonal?
Jun 16, 2014
answer
3
first order linear PDE solving
Aug 19, 2014
answer
3
Why consider square-integrable functions?
Sep 22, 2014
answer
3
Integration and differentiation of an approximation to a function - order of approximation
May 8, 2014
answer
3
Help Solving coupled linear PDEs by Separation of Variables
Nov 12, 2014
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7
Meaning of kinetic part in the Lagrangian density?
7
What is the commutator of an operator and its derivative?
6
Effective Hamiltonian / Perturbation theory for non-degenerate case
5
The Higgs vacuum
5
Are the Møller wave operators $\Omega_\pm$ related to $\lim_{t\rightarrow\infty}U(t)$ from field theory?