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seen Oct 6 '14 at 12:28

Learning from scratch


Feb
13
comment Degree of freedom paradox for a rigid body
Thanks though the number of degrees of freedom comes out to be 3. A rigid body is known to have 6 (3trans+3rot).
Feb
13
asked Degree of freedom paradox for a rigid body
Feb
13
revised Why can't we ascribe a (possibly velocity dependent) potential to a dissipative force?
deleted 63 characters in body
Feb
13
comment Why can't we ascribe a (possibly velocity dependent) potential to a dissipative force?
@Anna so velocity dependent potentials are actually used to describe conservative forces, is what you meant, right? I will edit my question.
Feb
13
asked Why can't we ascribe a (possibly velocity dependent) potential to a dissipative force?
Jan
4
awarded  Popular Question
Dec
19
comment Decay Amplitudes Notation
@DavidZaslavsky Yes It may be $B^- (b\bar{u}) ,B^0(b\bar{d})$ etc. $B_p$ means a b quark with a u/d quark
Dec
19
asked Decay Amplitudes Notation
Dec
13
comment Physics history book with some math
@Qmechanic It reminds me when Sheldon embarked on such a project.
Dec
13
answered Physics history book with some math
Dec
13
asked Irreducible tensors concept
Dec
9
accepted Pauli Matrices in orthogonal space
Dec
9
comment Pauli Matrices in orthogonal space
I see. Thanks! To sum it up: "$\sigma $" $= \sigma \otimes \mathbb{I}$ while "$\tau $" $=\mathbb{I}\otimes \sigma$
Dec
8
comment Pauli Matrices in orthogonal space
@DavidZaslavsky I dont have a link but the textbook in which this appears is Georgi's Lie Algebras... , chapters 3 (exercises) and chapter 6 (again, in the exercises)
Dec
8
asked Pauli Matrices in orthogonal space
Dec
5
accepted Question on ladder operators
Dec
4
asked Question on ladder operators
Dec
3
asked A simple action inequality
Nov
26
awarded  Popular Question
Nov
24
comment Fitting to a high density scatter plot
Could you provide me a reference to the track density and width model you suggested