2,344 reputation
11226
bio website
location
age 69
visits member for 3 years
seen 3 hours ago

14h
awarded  Citizen Patrol
Jul
20
comment How to evaluate the integral $\int e^{ipx}e^{ipx} d^{3}x = 0$
@Winther I think you are probably right. I added the reference and specifically what he was trying to show. Maybe your expertise will resolve it. Regards,
Jul
20
revised How to evaluate the integral $\int e^{ipx}e^{ipx} d^{3}x = 0$
added 193 characters in body
Jul
20
comment How to evaluate the integral $\int e^{ipx}e^{ipx} d^{3}x = 0$
@DanielFischer Dear Daniel, I always admire your presence here. Thanks for your insight,
Jul
20
revised How to evaluate the integral $\int e^{ipx}e^{ipx} d^{3}x = 0$
added 280 characters in body; edited tags
Jul
20
comment How to evaluate the integral $\int e^{ipx}e^{ipx} d^{3}x = 0$
@Semiclassical Thanks for your interest. This came up in the context of showing the orthogonality of eigensolutions of the Dirac equation for spinors. The author needs this relation to hold. Also, the author usually implies over all space in the context of integrals and uses a discrete summation over a finite space. Regards,
Jul
20
revised How to evaluate the integral $\int e^{ipx}e^{ipx} d^{3}x = 0$
added 54 characters in body
Jul
20
asked How to evaluate the integral $\int e^{ipx}e^{ipx} d^{3}x = 0$
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Jun
30
awarded  Yearling
Jun
10
comment Displacing a cosinus curve and keeping zero slope
Nice. I'm sure it won't be long till you have plenty of points.
Jun
9
revised Path to Basics in Algebraic Geometry from HS Algebra and Calculus?
fixed link
Jun
9
comment Displacing a cosinus curve and keeping zero slope
Hi Peter - In that you are new here, perhaps I could mention that helpful answers are usually upvoted. And if you feel that your question has been answered, the answer is accepted. Regards,
Jun
4
comment Path to Basics in Algebraic Geometry from HS Algebra and Calculus?
@ShreevatsaR Hi - Here is a link to Kendig "A guide to Plane Algebraic Curves" amazon.com/Algebraic-Curves-Dolciani-Mathematical-Expositions/…. Regards,
Apr
27
comment Tensors - need materials to study
If you're still in the game, you might want to look at these notes I just came across: ita.uni-heidelberg.de/~dullemond/lectures/tensor/tensor.pdf
Apr
18
answered Book recommendation for Linear algebra.
Apr
18
comment Book recommendation for Linear algebra.
Strang, whose book s mentioned below, has free video lectures of his course at MIT Open Courseware. This is the more "practical" LA course at MIT. On the more theoretical side, They tend to use Axler, "Linear Algebra Done Right."
Apr
18
comment Book recommendation for Linear algebra.
Have you searched for similar questions here? They have been answered with numerous, well-detailed recommendations.
Apr
2
comment Nice book on geometry to gift an undergraduate in mathematics
Thanks - very cool!