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bio website arxiv.org
location China
age 37
visits member for 1 year, 4 months
seen 12 hours ago

A student of physics at Nanjing Unversity.


Dec
29
comment First class and second class constraints
In a constrained system there are $\phi_i\approx 0 (i=1,2,\dots,n)$. If a constraint $\phi_{\alpha}$ vanishes $\{\phi_{\alpha},\phi_j\}\approx 0 (j=1,2,\dots,n)$, the constraint $\phi_{\alpha}$ is first-class, otherwise it is second-class.
Dec
24
answered Odd number of second class constraints (!)
Dec
24
answered Commutation for constraints
Dec
20
awarded  Teacher
Dec
20
awarded  Autobiographer
Dec
20
answered First class and second class constraints