ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  dvrass Unicode version

Theorem dvrass 14234
Description: An associative law for division. (divassap 8929 analog.) (Contributed by Mario Carneiro, 4-Dec-2014.)
Hypotheses
Ref Expression
dvrass.b  |-  B  =  ( Base `  R
)
dvrass.o  |-  U  =  (Unit `  R )
dvrass.d  |-  ./  =  (/r
`  R )
dvrass.t  |-  .x.  =  ( .r `  R )
Assertion
Ref Expression
dvrass  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( ( X  .x.  Y )  ./  Z )  =  ( X  .x.  ( Y 
./  Z ) ) )

Proof of Theorem dvrass
StepHypRef Expression
1 simpl 109 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  R  e.  Ring )
2 simpr1 1030 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  X  e.  B )
3 simpr2 1031 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  Y  e.  B )
4 simpr3 1032 . . . 4  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  Z  e.  U )
5 dvrass.o . . . . 5  |-  U  =  (Unit `  R )
6 eqid 2231 . . . . 5  |-  ( invr `  R )  =  (
invr `  R )
7 dvrass.b . . . . 5  |-  B  =  ( Base `  R
)
85, 6, 7ringinvcl 14220 . . . 4  |-  ( ( R  e.  Ring  /\  Z  e.  U )  ->  (
( invr `  R ) `  Z )  e.  B
)
94, 8syldan 282 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( ( invr `  R ) `  Z )  e.  B
)
10 dvrass.t . . . 4  |-  .x.  =  ( .r `  R )
117, 10ringass 14110 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  ( ( invr `  R
) `  Z )  e.  B ) )  -> 
( ( X  .x.  Y )  .x.  (
( invr `  R ) `  Z ) )  =  ( X  .x.  ( Y  .x.  ( ( invr `  R ) `  Z
) ) ) )
121, 2, 3, 9, 11syl13anc 1276 . 2  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( ( X  .x.  Y )  .x.  ( ( invr `  R
) `  Z )
)  =  ( X 
.x.  ( Y  .x.  ( ( invr `  R
) `  Z )
) ) )
137a1i 9 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  B  =  ( Base `  R )
)
1410a1i 9 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  .x.  =  ( .r `  R ) )
155a1i 9 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  U  =  (Unit `  R ) )
166a1i 9 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( invr `  R )  =  (
invr `  R )
)
17 dvrass.d . . . 4  |-  ./  =  (/r
`  R )
1817a1i 9 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ./  =  (/r `  R ) )
197, 10ringcl 14107 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  ( X  .x.  Y )  e.  B )
20193adant3r3 1241 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( X  .x.  Y )  e.  B
)
2113, 14, 15, 16, 18, 1, 20, 4dvrvald 14229 . 2  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( ( X  .x.  Y )  ./  Z )  =  ( ( X  .x.  Y
)  .x.  ( ( invr `  R ) `  Z ) ) )
2213, 14, 15, 16, 18, 1, 3, 4dvrvald 14229 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( Y  ./  Z )  =  ( Y  .x.  ( (
invr `  R ) `  Z ) ) )
2322oveq2d 6044 . 2  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( X  .x.  ( Y  ./  Z
) )  =  ( X  .x.  ( Y 
.x.  ( ( invr `  R ) `  Z
) ) ) )
2412, 21, 233eqtr4d 2274 1  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( ( X  .x.  Y )  ./  Z )  =  ( X  .x.  ( Y 
./  Z ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    /\ w3a 1005    = wceq 1398    e. wcel 2202   ` cfv 5333  (class class class)co 6028   Basecbs 13162   .rcmulr 13241   Ringcrg 14090  Unitcui 14181   invrcinvr 14215  /rcdvr 14226
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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2204  ax-14 2205  ax-ext 2213  ax-coll 4209  ax-sep 4212  ax-nul 4220  ax-pow 4270  ax-pr 4305  ax-un 4536  ax-setind 4641  ax-cnex 8183  ax-resscn 8184  ax-1cn 8185  ax-1re 8186  ax-icn 8187  ax-addcl 8188  ax-addrcl 8189  ax-mulcl 8190  ax-addcom 8192  ax-addass 8194  ax-i2m1 8197  ax-0lt1 8198  ax-0id 8200  ax-rnegex 8201  ax-pre-ltirr 8204  ax-pre-lttrn 8206  ax-pre-ltadd 8208
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-nel 2499  df-ral 2516  df-rex 2517  df-reu 2518  df-rmo 2519  df-rab 2520  df-v 2805  df-sbc 3033  df-csb 3129  df-dif 3203  df-un 3205  df-in 3207  df-ss 3214  df-nul 3497  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-uni 3899  df-int 3934  df-iun 3977  df-br 4094  df-opab 4156  df-mpt 4157  df-id 4396  df-xp 4737  df-rel 4738  df-cnv 4739  df-co 4740  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744  df-iota 5293  df-fun 5335  df-fn 5336  df-f 5337  df-f1 5338  df-fo 5339  df-f1o 5340  df-fv 5341  df-riota 5981  df-ov 6031  df-oprab 6032  df-mpo 6033  df-1st 6312  df-2nd 6313  df-tpos 6454  df-pnf 8275  df-mnf 8276  df-ltxr 8278  df-inn 9203  df-2 9261  df-3 9262  df-ndx 13165  df-slot 13166  df-base 13168  df-sets 13169  df-iress 13170  df-plusg 13253  df-mulr 13254  df-0g 13421  df-mgm 13519  df-sgrp 13565  df-mnd 13580  df-grp 13666  df-minusg 13667  df-cmn 13953  df-abl 13954  df-mgp 14015  df-ur 14054  df-srg 14058  df-ring 14092  df-oppr 14162  df-dvdsr 14183  df-unit 14184  df-invr 14216  df-dvr 14227
This theorem is referenced by:  dvrcan3  14236
  Copyright terms: Public domain W3C validator