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Theorem zindd 9444
Description: Principle of Mathematical Induction on all integers, deduction version. The first five hypotheses give the substitutions; the last three are the basis, the induction, and the extension to negative numbers. (Contributed by Paul Chapman, 17-Apr-2009.) (Proof shortened by Mario Carneiro, 4-Jan-2017.)
Hypotheses
Ref Expression
zindd.1  |-  ( x  =  0  ->  ( ph 
<->  ps ) )
zindd.2  |-  ( x  =  y  ->  ( ph 
<->  ch ) )
zindd.3  |-  ( x  =  ( y  +  1 )  ->  ( ph 
<->  ta ) )
zindd.4  |-  ( x  =  -u y  ->  ( ph 
<->  th ) )
zindd.5  |-  ( x  =  A  ->  ( ph 
<->  et ) )
zindd.6  |-  ( ze 
->  ps )
zindd.7  |-  ( ze 
->  ( y  e.  NN0  ->  ( ch  ->  ta ) ) )
zindd.8  |-  ( ze 
->  ( y  e.  NN  ->  ( ch  ->  th )
) )
Assertion
Ref Expression
zindd  |-  ( ze 
->  ( A  e.  ZZ  ->  et ) )
Distinct variable groups:    x, A    ch, x    et, x    ph, y    ps, x    ta, x    th, x    x, y, ze
Allowed substitution hints:    ph( x)    ps( y)    ch( y)    th( y)    ta( y)    et( y)    A( y)

Proof of Theorem zindd
StepHypRef Expression
1 znegcl 9357 . . . . . . 7  |-  ( y  e.  ZZ  ->  -u y  e.  ZZ )
2 elznn0nn 9340 . . . . . . 7  |-  ( -u y  e.  ZZ  <->  ( -u y  e.  NN0  \/  ( -u y  e.  RR  /\  -u -u y  e.  NN ) ) )
31, 2sylib 122 . . . . . 6  |-  ( y  e.  ZZ  ->  ( -u y  e.  NN0  \/  ( -u y  e.  RR  /\  -u -u y  e.  NN ) ) )
4 simpr 110 . . . . . . 7  |-  ( (
-u y  e.  RR  /\  -u -u y  e.  NN )  ->  -u -u y  e.  NN )
54orim2i 762 . . . . . 6  |-  ( (
-u y  e.  NN0  \/  ( -u y  e.  RR  /\  -u -u y  e.  NN ) )  -> 
( -u y  e.  NN0  \/  -u -u y  e.  NN ) )
63, 5syl 14 . . . . 5  |-  ( y  e.  ZZ  ->  ( -u y  e.  NN0  \/  -u -u y  e.  NN ) )
7 zcn 9331 . . . . . . . 8  |-  ( y  e.  ZZ  ->  y  e.  CC )
87negnegd 8328 . . . . . . 7  |-  ( y  e.  ZZ  ->  -u -u y  =  y )
98eleq1d 2265 . . . . . 6  |-  ( y  e.  ZZ  ->  ( -u -u y  e.  NN  <->  y  e.  NN ) )
109orbi2d 791 . . . . 5  |-  ( y  e.  ZZ  ->  (
( -u y  e.  NN0  \/  -u -u y  e.  NN ) 
<->  ( -u y  e. 
NN0  \/  y  e.  NN ) ) )
116, 10mpbid 147 . . . 4  |-  ( y  e.  ZZ  ->  ( -u y  e.  NN0  \/  y  e.  NN )
)
12 zindd.1 . . . . . . . 8  |-  ( x  =  0  ->  ( ph 
<->  ps ) )
1312imbi2d 230 . . . . . . 7  |-  ( x  =  0  ->  (
( ze  ->  ph )  <->  ( ze  ->  ps )
) )
14 zindd.2 . . . . . . . 8  |-  ( x  =  y  ->  ( ph 
<->  ch ) )
1514imbi2d 230 . . . . . . 7  |-  ( x  =  y  ->  (
( ze  ->  ph )  <->  ( ze  ->  ch )
) )
16 zindd.3 . . . . . . . 8  |-  ( x  =  ( y  +  1 )  ->  ( ph 
<->  ta ) )
1716imbi2d 230 . . . . . . 7  |-  ( x  =  ( y  +  1 )  ->  (
( ze  ->  ph )  <->  ( ze  ->  ta )
) )
18 zindd.4 . . . . . . . 8  |-  ( x  =  -u y  ->  ( ph 
<->  th ) )
1918imbi2d 230 . . . . . . 7  |-  ( x  =  -u y  ->  (
( ze  ->  ph )  <->  ( ze  ->  th )
) )
20 zindd.6 . . . . . . 7  |-  ( ze 
->  ps )
21 zindd.7 . . . . . . . . 9  |-  ( ze 
->  ( y  e.  NN0  ->  ( ch  ->  ta ) ) )
2221com12 30 . . . . . . . 8  |-  ( y  e.  NN0  ->  ( ze 
->  ( ch  ->  ta ) ) )
2322a2d 26 . . . . . . 7  |-  ( y  e.  NN0  ->  ( ( ze  ->  ch )  ->  ( ze  ->  ta ) ) )
2413, 15, 17, 19, 20, 23nn0ind 9440 . . . . . 6  |-  ( -u y  e.  NN0  ->  ( ze  ->  th ) )
2524com12 30 . . . . 5  |-  ( ze 
->  ( -u y  e. 
NN0  ->  th ) )
26 nnnn0 9256 . . . . . . . 8  |-  ( y  e.  NN  ->  y  e.  NN0 )
2713, 15, 17, 15, 20, 23nn0ind 9440 . . . . . . . 8  |-  ( y  e.  NN0  ->  ( ze 
->  ch ) )
2826, 27syl 14 . . . . . . 7  |-  ( y  e.  NN  ->  ( ze  ->  ch ) )
2928com12 30 . . . . . 6  |-  ( ze 
->  ( y  e.  NN  ->  ch ) )
30 zindd.8 . . . . . 6  |-  ( ze 
->  ( y  e.  NN  ->  ( ch  ->  th )
) )
3129, 30mpdd 41 . . . . 5  |-  ( ze 
->  ( y  e.  NN  ->  th ) )
3225, 31jaod 718 . . . 4  |-  ( ze 
->  ( ( -u y  e.  NN0  \/  y  e.  NN )  ->  th )
)
3311, 32syl5 32 . . 3  |-  ( ze 
->  ( y  e.  ZZ  ->  th ) )
3433ralrimiv 2569 . 2  |-  ( ze 
->  A. y  e.  ZZ  th )
35 znegcl 9357 . . . . 5  |-  ( x  e.  ZZ  ->  -u x  e.  ZZ )
36 negeq 8219 . . . . . . . . 9  |-  ( y  =  -u x  ->  -u y  =  -u -u x )
37 zcn 9331 . . . . . . . . . 10  |-  ( x  e.  ZZ  ->  x  e.  CC )
3837negnegd 8328 . . . . . . . . 9  |-  ( x  e.  ZZ  ->  -u -u x  =  x )
3936, 38sylan9eqr 2251 . . . . . . . 8  |-  ( ( x  e.  ZZ  /\  y  =  -u x )  ->  -u y  =  x )
4039eqcomd 2202 . . . . . . 7  |-  ( ( x  e.  ZZ  /\  y  =  -u x )  ->  x  =  -u y )
4140, 18syl 14 . . . . . 6  |-  ( ( x  e.  ZZ  /\  y  =  -u x )  ->  ( ph  <->  th )
)
4241bicomd 141 . . . . 5  |-  ( ( x  e.  ZZ  /\  y  =  -u x )  ->  ( th  <->  ph ) )
4335, 42rspcdv 2871 . . . 4  |-  ( x  e.  ZZ  ->  ( A. y  e.  ZZ  th 
->  ph ) )
4443com12 30 . . 3  |-  ( A. y  e.  ZZ  th  ->  ( x  e.  ZZ  ->  ph ) )
4544ralrimiv 2569 . 2  |-  ( A. y  e.  ZZ  th  ->  A. x  e.  ZZ  ph )
46 zindd.5 . . 3  |-  ( x  =  A  ->  ( ph 
<->  et ) )
4746rspccv 2865 . 2  |-  ( A. x  e.  ZZ  ph  ->  ( A  e.  ZZ  ->  et ) )
4834, 45, 473syl 17 1  |-  ( ze 
->  ( A  e.  ZZ  ->  et ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    \/ wo 709    = wceq 1364    e. wcel 2167   A.wral 2475  (class class class)co 5922   RRcr 7878   0cc0 7879   1c1 7880    + caddc 7882   -ucneg 8198   NNcn 8990   NN0cn0 9249   ZZcz 9326
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4151  ax-pow 4207  ax-pr 4242  ax-un 4468  ax-setind 4573  ax-cnex 7970  ax-resscn 7971  ax-1cn 7972  ax-1re 7973  ax-icn 7974  ax-addcl 7975  ax-addrcl 7976  ax-mulcl 7977  ax-addcom 7979  ax-addass 7981  ax-distr 7983  ax-i2m1 7984  ax-0lt1 7985  ax-0id 7987  ax-rnegex 7988  ax-cnre 7990  ax-pre-ltirr 7991  ax-pre-ltwlin 7992  ax-pre-lttrn 7993  ax-pre-ltadd 7995
This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-pw 3607  df-sn 3628  df-pr 3629  df-op 3631  df-uni 3840  df-int 3875  df-br 4034  df-opab 4095  df-id 4328  df-xp 4669  df-rel 4670  df-cnv 4671  df-co 4672  df-dm 4673  df-iota 5219  df-fun 5260  df-fv 5266  df-riota 5877  df-ov 5925  df-oprab 5926  df-mpo 5927  df-pnf 8063  df-mnf 8064  df-xr 8065  df-ltxr 8066  df-le 8067  df-sub 8199  df-neg 8200  df-inn 8991  df-n0 9250  df-z 9327
This theorem is referenced by:  efexp  11847  pcexp  12478  mulgaddcom  13276  mulginvcom  13277  mulgneg2  13286  mulgass2  13614  cnfldmulg  14132
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