
#1
Mar1112, 10:35 AM

P: 8

In (3+1) dimension Poincare group has three types of Symmetries :
I. Spacetime translations  4 II. Spatial rotations 3 & III. Boosts 3 Among them, (I) implies "conservation of 4momentum" , (II) implies "conservation of angular momentum" , But what "Physical entity" is conserved for BOOSTS ?? 


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