Kostya

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6,744 reputation
1147
bio website physics.stackexchange.com/…
location Italy
age 29
visits member for 2 years, 6 months
seen 15 hours ago
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Currently working in particle physics -- theory and phenomenology. Member of CMS collaboration.

Interests: theoretical physics, computer science, guitar.
Countries: Russia, Poland, Italy.


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May
8
 comment Renormalization condition: why must be the residue of the propagator be 1
But ... why not?
May
8
 comment Parallel transport of a vector along a closed curve in curvilinear coordinates
@PhysiXxx Have you noticed that quadratic terms (whatever they are) are, indeed, of the second order in $\Delta f^{lm}$?
May
7
 comment Parallel transport of a vector along a closed curve in curvilinear coordinates
@PhysiXxx yor decompositions are single-valued?
May
7
 answered Parallel transport of a vector along a closed curve in curvilinear coordinates
May
6
 comment Michaelis-Menten derivation for 2 enzyme substrates
@ngzongyi Well, by analogy: $$\frac{\partial [ES_2]}{\partial t}=0 \quad\Rightarrow\quad k_{tran}[ES_1]=k_{cat}[ES_2]$$
May
6
 answered Michaelis-Menten derivation for 2 enzyme substrates
Apr
20
 answered Product of VEVs vs. VEV of product
Apr
10
 comment Can pure maths create new theories in physics or does the “idea” ALWAYS come before the math?
@Gugg I'm afraid that reading the book is the only course of actions that could (in principle) clarify everything for you. But I've tried t clarify at test the general idea.
Apr
10
 revised Can pure maths create new theories in physics or does the “idea” ALWAYS come before the math?
added 349 characters in body
Apr
9
 answered Special Relativity Second Postulate
Apr
8
 revised Can scattering amplitudes be simplified with 1PI diagrams?
edited body
Apr
8
 answered Can scattering amplitudes be simplified with 1PI diagrams?
Apr
7
 answered Can pure maths create new theories in physics or does the “idea” ALWAYS come before the math?
Apr
6
 comment Resistance between two points in an infinite metal sphere/cube
possible duplicate of Resistance between two points on a conducting surface
Apr
5
 revised Fraunhofer diffraction simulation for a hexagonal aperture, what are the typical units?
added 5 characters in body
Apr
5
 comment How does Fraunhofer diffraction depend on the orientation of the sides of a lens?
@ChristianR Lets just link your follow-up here. physics.stackexchange.com/questions/60070/…
Apr
5
 answered Fraunhofer diffraction simulation for a hexagonal aperture, what are the typical units?
Apr
4
 awarded  Nice Question
Mar
30
 awarded  Popular Question
Mar
20
 answered Results of Statistical Mechanics first obtained by formal mathematical methods
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