let m, k be Nat; :: thesis: ( m >= 1 & k >= 2 implies for r being Tuple of m + 2,k -SD holds SDDec (Mmax r) < (SDDec (M0 r)) + (SDDec (Fmin ((m + 2),m,k))) )
assume that
A1: m >= 1 and
A2: k >= 2 ; :: thesis: for r being Tuple of m + 2,k -SD holds SDDec (Mmax r) < (SDDec (M0 r)) + (SDDec (Fmin ((m + 2),m,k)))
A3: m + 2 > 1 by A1, Lm1;
let r be Tuple of m + 2,k -SD ; :: thesis: SDDec (Mmax r) < (SDDec (M0 r)) + (SDDec (Fmin ((m + 2),m,k)))
A4: (SDDec (Mmax r)) + 1 > (SDDec (Mmax r)) + 0 by XREAL_1:8;
A5: (SDDec (M0 r)) + (SDDec (SDMax ((m + 2),m,k))) = (SDDec (Mmax r)) + (SDDec (DecSD (0,(m + 2),k))) by A2, Th9
.= (SDDec (Mmax r)) + 0 by A3, RADIX_5:6 ;
m in Seg (m + 2) by A1, FINSEQ_3:9;
then SDDec (Fmin ((m + 2),m,k)) = (SDDec (SDMax ((m + 2),m,k))) + (SDDec (DecSD (1,(m + 2),k))) by A2, A3, RADIX_5:18
.= (SDDec (SDMax ((m + 2),m,k))) + 1 by A2, A3, RADIX_5:9 ;
hence SDDec (Mmax r) < (SDDec (M0 r)) + (SDDec (Fmin ((m + 2),m,k))) by A5, A4; :: thesis: verum