mulneg12 - Intuitionistic Logic Explorer

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Theorem mulneg12 7929

Description: Swap the negative sign in a product. (Contributed by NM, 30-Jul-2004.)

**Assertion**
Ref	Expression
mulneg12	$/\$

**Proof of Theorem mulneg12**
Step	Hyp	Ref	Expression
1		mulneg1 7927	. 2 $/\$
2		mulneg2 7928	. 2 $/\$
3	1, 2	eqtr4d 2124	1 $/\$

Colors of variables: wff set class

Syntax hints:

wi 4 $/\$ wa 103

wceq 1290

wcel 1439 (class class class)co 5666

cc 7402

cmul 7409

cneg 7708

This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 580 ax-in2 581 ax-io 666 ax-5 1382 ax-7 1383 ax-gen 1384 ax-ie1 1428 ax-ie2 1429 ax-8 1441 ax-10 1442 ax-11 1443 ax-i12 1444 ax-bndl 1445 ax-4 1446 ax-14 1451 ax-17 1465 ax-i9 1469 ax-ial 1473 ax-i5r 1474 ax-ext 2071 ax-sep 3963 ax-pow 4015 ax-pr 4045 ax-setind 4366 ax-resscn 7491 ax-1cn 7492 ax-icn 7494 ax-addcl 7495 ax-addrcl 7496 ax-mulcl 7497 ax-addcom 7499 ax-mulcom 7500 ax-addass 7501 ax-distr 7503 ax-i2m1 7504 ax-0id 7507 ax-rnegex 7508 ax-cnre 7510

This theorem depends on definitions: df-bi 116 df-3an 927 df-tru 1293 df-fal 1296 df-nf 1396 df-sb 1694 df-eu 1952 df-mo 1953 df-clab 2076 df-cleq 2082 df-clel 2085 df-nfc 2218 df-ne 2257 df-ral 2365 df-rex 2366 df-reu 2367 df-rab 2369 df-v 2622 df-sbc 2842 df-dif 3002 df-un 3004 df-in 3006 df-ss 3013 df-pw 3435 df-sn 3456 df-pr 3457 df-op 3459 df-uni 3660 df-br 3852 df-opab 3906 df-id 4129 df-xp 4457 df-rel 4458 df-cnv 4459 df-co 4460 df-dm 4461 df-iota 4993 df-fun 5030 df-fv 5036 df-riota 5622 df-ov 5669 df-oprab 5670 df-mpt2 5671 df-sub 7709 df-neg 7710

This theorem is referenced by: mul2neg 7930 crim 10346 efi4p 11062 sinneg 11071 cosneg 11072 efmival 11078 negdvdsb 11144 divalglemex 11254 bezoutlemaz 11324 bezoutlembz 11325