00603nam a22001817a 4500003000400000005001700004008004100021020001500062028002600077082001600103100002400119245013200143260004400275300001500319440005100334655001600385655002000401SNU20150624112831.0150624b        xxu||||| |||| 00| 0 eng d  a0123383013  aElinor Donation bUSA  a512.55 HEL   aHelgason, Sigurdur   aGroups and geometric analysis: integral geometry, invariant differential operators, and spherical functionsc\Sigurdur Helgason  a.- New York b:	Academic Pressc@, 1984  a	654 pages  a.-(Volume 113 of Pure and applied mathematics)  aMathematics  aLinear Algebra