00323nam a22001457a 450000500170000002000180001704100120003508200190004710000180006624500250008425000070010926000410011630000080015736500120016520260511113836.0  a9788180549281  aEnglish  a530.15 R23 PRA  aPrakash Satya  aMathematical Physics  a01  aNew DelhibSultan Chand & Sonsc2023  a800  b1000.00