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| Mirrors > Home > MPE Home > Th. List > eldifsnd | Structured version Visualization version GIF version | ||
| Description: Membership in a set with an element removed : deduction version. (Contributed by Thierry Arnoux, 4-May-2025.) |
| Ref | Expression |
|---|---|
| eldifsnd.1 | ⊢ (𝜑 → 𝐴 ∈ 𝐵) |
| eldifsnd.2 | ⊢ (𝜑 → 𝐴 ≠ 𝐶) |
| Ref | Expression |
|---|---|
| eldifsnd | ⊢ (𝜑 → 𝐴 ∈ (𝐵 ∖ {𝐶})) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eldifsnd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝐵) | |
| 2 | eldifsnd.2 | . 2 ⊢ (𝜑 → 𝐴 ≠ 𝐶) | |
| 3 | eldifsn 4748 | . 2 ⊢ (𝐴 ∈ (𝐵 ∖ {𝐶}) ↔ (𝐴 ∈ 𝐵 ∧ 𝐴 ≠ 𝐶)) | |
| 4 | 1, 2, 3 | sylanbrc 595 | 1 ⊢ (𝜑 → 𝐴 ∈ (𝐵 ∖ {𝐶})) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2145 ≠ wne 2956 ∖ cdif 3896 {csn 4584 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-v 3453 df-dif 3902 df-sn 4585 |
| This theorem is used by: elpwdifsn 4752 prproe 4865 pfxchn 18784 chnind 18795 chnrev 18801 isdrng2 20997 isdrng3lem1 21005 isdrng3lem2 21006 drngmcl 21009 r1pid2 26480 preimaaa 26646 angmgm 29397 dfprlng3 29426 irrednzr 33811 fracfld 33870 mxidlirredi 33996 rprmasso2 34058 rprmirredlem 34062 1arithidomlem1 34067 ufdprmidl 34073 1arithufdlem3 34078 1arithufdlem4 34079 dfufd2lem 34081 dfufd2 34082 zringfrac 34086 ply1dg1rt 34112 esplyind 34207 vietadeg1 34210 r1peuqusdeg1 36408 unitscyglem4 43248 resuppsinopn 43414 readvcot 43415 redivvald 43493 domnexpgn0cl 43584 drngmullcan 43586 drngmulrcan 43587 prjspvs 43638 frlmnzcoordsca 43658 prjspnnorm 43661 sqrtnnaa 47912 sqrtnzqaa 47913 |
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