Resummation

In mathematics and theoretical physics, resummation is a procedure to obtain a finite result from a divergent sum (series) of functions. Resummation involves a definition of another (convergent) function in which the individual terms defining the original function are re-scaled, and an integral transformation of this new function to obtain the original function. Borel resummation is probably the most well-known example. The simplest method is an extension of a variational approach to higher order based on a paper by R.P. Feynman and H. Kleinert. In quantum mechanics it was extended to any order here, and in quantum field theory here. See also Chapters 16–20 in the textbook cited below.

单词	Resummation
释义	Resummation 英语百科 Resummation In mathematics and theoretical physics, resummation is a procedure to obtain a finite result from a divergent sum (series) of functions. Resummation involves a definition of another (convergent) function in which the individual terms defining the original function are re-scaled, and an integral transformation of this new function to obtain the original function. Borel resummation is probably the most well-known example. The simplest method is an extension of a variational approach to higher order based on a paper by R.P. Feynman and H. Kleinert. In quantum mechanics it was extended to any order here, and in quantum field theory here. See also Chapters 16–20 in the textbook cited below.
随便看	impulse testing impulse testing machine impulse testing machine circuit impulse theory impulse time impulse time delay impulse time division system impulse time margin impulse timer impulse time relay impulse to mass ratio of nozzle Impulse to steal impulse totalizer impulse track circuit current Impulse train impulse train generator impulse train modulation impulse transfer impulse transferor impulse transformator impulse transformer impulse transmission impulse transmitter impulse transmitter tube impulse transmitting relay