科研之友
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摘要
The identity
integral(pi/2)(0) d phi integral(pi/2)(0) d theta sin phi F (x sin phi sin theta) = pi/2 integral(1)(0) F (xt) dt,
where F is any function, is derived. Several extensions are given and a few examples of physical interest are described.
- 出版日期2011-6-3
