Az Egri Ho Si Minh Tanárképző Főiskola Tud. Közleményei. 1987. (Acta Academiae Paedagogicae Agriensis : Nova series ; Tom. 18/13)

Tamás Franczia: An analytical method for calculating multicentre integrals built up from GTF-S I

- 39 oc. Z +a, Z J p p k q q ^ - Z - C18c) 1 a. +a, J P kq arguments in place of ( X, , the exponential function factor in the integrandus is to be written in the exp [- [a

j

p+a

k

q] (<

2+7?

2+<

2] form. The integral in (15) expressed with the arguments gets a constant multiplier in front of the sign of the integration: exp fa. X +a. X ]

2+ía. Y +a, Y ]%fa Z +a, Z 1 I JP P kq qj I JP P kq qJ I JP P kq qj a

. + a, J P kq ia. X

2+a X

2] - fa. Y

2-*-a. Y

2] - ía. Z

2+a, Z

2] L J P P kq qj I JP P kq qj I JP P kq qj rising only from the (17) expression of the exponent because from (18) we get the