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Mirrors > Home > ILE Home > Th. List > neneqd | GIF version |
Description: Deduction eliminating inequality definition. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) |
Ref | Expression |
---|---|
neneqd.1 | ⊢ (𝜑 → 𝐴 ≠ 𝐵) |
Ref | Expression |
---|---|
neneqd | ⊢ (𝜑 → ¬ 𝐴 = 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | neneqd.1 | . 2 ⊢ (𝜑 → 𝐴 ≠ 𝐵) | |
2 | df-ne 2309 | . 2 ⊢ (𝐴 ≠ 𝐵 ↔ ¬ 𝐴 = 𝐵) | |
3 | 1, 2 | sylib 121 | 1 ⊢ (𝜑 → ¬ 𝐴 = 𝐵) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 = wceq 1331 ≠ wne 2308 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 |
This theorem depends on definitions: df-bi 116 df-ne 2309 |
This theorem is referenced by: neneq 2330 necon2bi 2363 necon2i 2364 pm2.21ddne 2391 nelrdva 2891 neq0r 3377 0inp0 4090 pwntru 4122 nndceq0 4531 frecabcl 6296 frecsuclem 6303 nnsucsssuc 6388 phpm 6759 diffisn 6787 en2eqpr 6801 fival 6858 omp1eomlem 6979 difinfsnlem 6984 difinfsn 6985 ctmlemr 6993 fodjuomnilemdc 7016 indpi 7153 nqnq0pi 7249 ltxrlt 7833 sup3exmid 8718 elnnz 9067 xrnemnf 9567 xrnepnf 9568 xrlttri3 9586 nltpnft 9600 ngtmnft 9603 xrpnfdc 9628 xrmnfdc 9629 xleaddadd 9673 fzprval 9865 fxnn0nninf 10214 iseqf1olemklt 10261 seq3f1olemqsumkj 10274 expnnval 10299 xrmaxrecl 11027 fsumcl2lem 11170 dvdsle 11545 mod2eq1n2dvds 11579 nndvdslegcd 11657 gcdnncl 11659 divgcdnn 11666 sqgcd 11720 eucalgf 11739 eucalginv 11740 lcmeq0 11755 lcmgcdlem 11761 qredeu 11781 rpdvds 11783 cncongr2 11788 divnumden 11877 divdenle 11878 phibndlem 11895 ennnfonelemk 11916 ennnfonelemjn 11918 ennnfonelemp1 11922 ennnfonelemim 11940 isxmet2d 12520 dvexp2 12848 nnsf 13202 peano4nninf 13203 exmidsbthrlem 13220 refeq 13226 trilpolemeq1 13236 |
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