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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 4750 | . 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 2147 ≠ wne 2959 ∖ cdif 4048 {csn 4588 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ne 2960 df-v 3456 df-dif 4050 df-sn 4589 |
| This theorem is used by: elpwdifsn 4754 prproe 4838 pfxchn 18834 chnind 18845 chnrev 18851 isdrng2 21048 isdrng3lem1 21056 isdrng3lem2 21057 drngmcl 21060 r1pid2 26535 preimaaa 26703 qaa 26704 angmgm 29454 dfprlng3 29483 irrednzr 33910 isedom 33953 edomediv 33955 zzedom 33958 ply1edom 33959 edompidlem 33960 fracfld 33974 mxidlirredi 34100 rprmasso2 34162 rprmirredlem 34166 1arithidomlem1 34171 ufdprmidl 34177 1arithufdlem3 34182 1arithufdlem4 34183 dfufd2lem 34185 dfufd2 34186 zringfrac 34189 ply1dg1rt 34215 esplyind 34318 vietadeg1 34321 r1peuqusdeg1 36616 unitscyglem4 43514 resuppsinopn 43680 readvcot 43681 redivvald 43759 domnexpgn0cl 43850 drngmullcan 43852 drngmulrcan 43853 prjspvs 43904 frlmnzcoordsca 43924 prjspnnorm 43927 sqrtnnaa 48186 sqrtnzqaa 48187 tanhcl 51250 |
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