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Theorem dvrass 13308
Description: An associative law for division. (divassap 8647 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 1003 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  X  e.  B )
3 simpr2 1004 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  Y  e.  B )
4 simpr3 1005 . . . 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 2177 . . . . 5  |-  ( invr `  R )  =  (
invr `  R )
7 dvrass.b . . . . 5  |-  B  =  ( Base `  R
)
85, 6, 7ringinvcl 13294 . . . 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 13199 . . 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 1240 . 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 13196 . . . 4  |-  ( ( R  e.  Ring  /\  X  e.  B  /\  Y  e.  B )  ->  ( X  .x.  Y )  e.  B )
20193adant3r3 1214 . . 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 13303 . 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 13303 . . 3  |-  ( ( R  e.  Ring  /\  ( X  e.  B  /\  Y  e.  B  /\  Z  e.  U )
)  ->  ( Y  ./  Z )  =  ( Y  .x.  ( (
invr `  R ) `  Z ) ) )
2322oveq2d 5891 . 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 2220 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 978    = wceq 1353    e. wcel 2148   ` cfv 5217  (class class class)co 5875   Basecbs 12462   .rcmulr 12537   Ringcrg 13179  Unitcui 13256   invrcinvr 13289  /rcdvr 13300
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 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-coll 4119  ax-sep 4122  ax-nul 4130  ax-pow 4175  ax-pr 4210  ax-un 4434  ax-setind 4537  ax-cnex 7902  ax-resscn 7903  ax-1cn 7904  ax-1re 7905  ax-icn 7906  ax-addcl 7907  ax-addrcl 7908  ax-mulcl 7909  ax-addcom 7911  ax-addass 7913  ax-i2m1 7916  ax-0lt1 7917  ax-0id 7919  ax-rnegex 7920  ax-pre-ltirr 7923  ax-pre-lttrn 7925  ax-pre-ltadd 7927
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-nel 2443  df-ral 2460  df-rex 2461  df-reu 2462  df-rmo 2463  df-rab 2464  df-v 2740  df-sbc 2964  df-csb 3059  df-dif 3132  df-un 3134  df-in 3136  df-ss 3143  df-nul 3424  df-pw 3578  df-sn 3599  df-pr 3600  df-op 3602  df-uni 3811  df-int 3846  df-iun 3889  df-br 4005  df-opab 4066  df-mpt 4067  df-id 4294  df-xp 4633  df-rel 4634  df-cnv 4635  df-co 4636  df-dm 4637  df-rn 4638  df-res 4639  df-ima 4640  df-iota 5179  df-fun 5219  df-fn 5220  df-f 5221  df-f1 5222  df-fo 5223  df-f1o 5224  df-fv 5225  df-riota 5831  df-ov 5878  df-oprab 5879  df-mpo 5880  df-1st 6141  df-2nd 6142  df-tpos 6246  df-pnf 7994  df-mnf 7995  df-ltxr 7997  df-inn 8920  df-2 8978  df-3 8979  df-ndx 12465  df-slot 12466  df-base 12468  df-sets 12469  df-iress 12470  df-plusg 12549  df-mulr 12550  df-0g 12707  df-mgm 12775  df-sgrp 12808  df-mnd 12818  df-grp 12880  df-minusg 12881  df-cmn 13090  df-abl 13091  df-mgp 13131  df-ur 13143  df-srg 13147  df-ring 13181  df-oppr 13240  df-dvdsr 13258  df-unit 13259  df-invr 13290  df-dvr 13301
This theorem is referenced by:  dvrcan3  13310
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