| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 4744 | . 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 2144 ≠ wne 2955 ∖ cdif 4044 {csn 4584 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-v 3452 df-dif 4046 df-sn 4585 |
| This theorem is used by: elpwdifsn 4748 prproe 4832 pfxchn 18793 chnind 18804 chnrev 18810 isdrng2 21006 isdrng3lem1 21014 isdrng3lem2 21015 drngmcl 21018 r1pid2 26489 preimaaa 26655 qaa 26656 angmgm 29406 dfprlng3 29435 irrednzr 33861 fracfld 33920 mxidlirredi 34046 rprmasso2 34108 rprmirredlem 34112 1arithidomlem1 34117 ufdprmidl 34123 1arithufdlem3 34128 1arithufdlem4 34129 dfufd2lem 34131 dfufd2 34132 zringfrac 34136 ply1dg1rt 34162 esplyind 34257 vietadeg1 34260 r1peuqusdeg1 36526 unitscyglem4 43385 resuppsinopn 43551 readvcot 43552 redivvald 43630 domnexpgn0cl 43721 drngmullcan 43723 drngmulrcan 43724 prjspvs 43775 frlmnzcoordsca 43795 prjspnnorm 43798 sqrtnnaa 48049 sqrtnzqaa 48050 |
| Copyright terms: Public domain | W3C validator |