. - , , . . , . : , .
, , s(t) :,
s (t) = s (t ), = 1, 2,... (3.8).
T- .
[-T/2, T/2] .
um (3.8). , s (t) , . . Cm=(s,um),
, (3.9) . (3.9) .
v , , , : (u,v)= . (3.1)
H ( , , ). [t1, t2], . , {u0,u1,.,un,}, :(ui,uj) = 1, i=j (3.2)
0, i j
, .
s(t) H :
s(t)= (3.3) (3.3) s(t) . . k k, (3.3) :
(3.4)
(3.4) i = k, (3.5)
. [0,] , (3.6)