| 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 4755 | . 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 2146 ≠ wne 2960 ∖ cdif 3903 {csn 4591 |
| 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 2148 ax-9 2156 ax-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-v 3459 df-dif 3909 df-sn 4592 |
| This theorem is used by: elpwdifsn 4759 prproe 4872 pfxchn 18690 chnind 18701 chnrev 18707 isdrng3lem1 20903 isdrng3lem2 20904 drngmcl 20907 r1pid2 26372 dfprlng3 29255 irrednzr 33636 fracfld 33695 mxidlirredi 33820 rprmasso2 33882 rprmirredlem 33886 1arithidomlem1 33891 ufdprmidl 33897 1arithufdlem3 33902 1arithufdlem4 33903 dfufd2lem 33905 dfufd2 33906 zringfrac 33910 ply1dg1rt 33936 esplyind 34031 vietadeg1 34034 r1peuqusdeg1 36174 unitscyglem4 43025 resuppsinopn 43184 readvcot 43185 redivvald 43263 domnexpgn0cl 43351 drngmullcan 43353 drngmulrcan 43354 prjspvs 43402 sqrtnzqaa 47665 |
| Copyright terms: Public domain | W3C validator |