0.,,., m Euclid m m. 2.., M., M R 2 ψ. ψ,, R 2 M.,, (x 1 (),, x m ()) R m. 2 M, R f. M (x 1,, x m ), f (x 1,, x m ) f(x 1,, x m ). f ( ). x i : M R.,,
(Kazuo Iida) (Youichi Murakami) 1,.,. ( ).,,,.,.,.. ( ) ( ),,.. (Taylor $)$ [1].,.., $\mathrm{a}1[2]$ Fermigier et $56\mathrm{m}
,.,.,,. [15],.,.,,., , 1., , 1., 1,., 1,,., 1. i