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| Mirrors > Home > ILE Home > Th. List > necomd | GIF version | ||
| Description: Deduction from commutative law for inequality. (Contributed by NM, 12-Feb-2008.) |
| Ref | Expression |
|---|---|
| necomd.1 | ⊢ (𝜑 → 𝐴 ≠ 𝐵) |
| Ref | Expression |
|---|---|
| necomd | ⊢ (𝜑 → 𝐵 ≠ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | necomd.1 | . 2 ⊢ (𝜑 → 𝐴 ≠ 𝐵) | |
| 2 | necom 2504 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ 𝐵 ≠ 𝐴) | |
| 3 | 1, 2 | sylib 122 | 1 ⊢ (𝜑 → 𝐵 ≠ 𝐴) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ≠ wne 2420 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-5 1500 ax-gen 1502 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 df-ne 2421 |
| This theorem is used by: ifnefals 3685 difsnb 3858 0nelop 4390 frecabcl 6674 fidifsnen 7177 tpfidisj 7241 omp1eomlem 7441 difinfsnlem 7446 fodjuomnilemdc 7491 en2eleq 7554 en2other2 7555 netap 7627 2omotaplemap 7630 ltned 8447 lt0ne0 8764 zdceq 9732 zneo 9759 xrlttri3 10217 qdceq 10697 flqltnz 10744 seqf1oglem1 10978 nn0opthd 11183 hashdifpr 11284 hashtpgim 11320 cats1un 11516 sumtp 12207 nninfctlemfo 12843 isprm2lem 12920 oddprm 13068 pcmpt 13152 ennnfonelemex 13364 psrridmfi 15205 perfectlem2 16312 lgsneg 16360 lgseisenlem4 16409 lgsquadlem1 16413 lgsquadlem3 16415 lgsquad2 16419 2lgsoddprm 16449 funvtxval0d 16491 umgrvad2edg 16669 1hegrvtxdg1rfi 16768 vdegp1bid 16773 umgr2cwwk2dif 16882 eupth2lem3lem4fi 16931 pw1ndom3lem 17236 pw1ndom3 17237 |
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