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 Mar 19 awarded Yearling Nov 24 awarded Popular Question Nov 8 awarded Popular Question Oct 7 awarded Popular Question Apr 1 awarded Notable Question Oct 17 awarded Nice Question Sep 18 awarded Yearling Jan 4 awarded Popular Question May 5 accepted How do I derive the transformation law of a Weyl spinor under a Lorentz transformation? May 4 comment How do I derive the transformation law of a Weyl spinor under a Lorentz transformation? my question isn't fuzzy i think. I just wanted to get the equation$\xi ~\rightarrow~ \exp\left(\ i \frac{\bf{\sigma}}{2}\cdot \theta +\frac{\bf{\sigma}}{2} \cdot \phi\right) \xi~?$. any help would be approciated. Thanx. May 1 comment Derrick’s theorem Can you look at the equation (1) that how it came from the previous line? May 1 asked Suggestions contents for soliton theory May 1 accepted Vortex in D dimensions soliton May 1 comment Vortex in D dimensions soliton This is about global vortices in two dimensions. Fields cannot be continuously deformed to a vacuum solution can you focus on this please? May 1 accepted Derrick’s theorem May 1 asked Derrick’s theorem Apr 30 comment Vortex in D dimensions soliton Classical Solutions in Quantum Field Theory Solitons and Instantons in High Energy Physics ERICK J. WEINBERG Columbia University page no : 39 Apr 30 asked Vortex in D dimensions soliton Apr 30 comment sine-Gordon equation Can you please write some details the difference between,scalar field theory and $\phi^4$ theory? Apr 30 comment sine-Gordon equation Can you please look the book byLewis H.Rider page no (403). He discussed sine-Gordon equation with explaing the $\phi^4$ terms including which confirms us a relation between $\phi^4$ theory and sine-Gordon equation.