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Mirrors > Home > MPE Home > Th. List > 0elixp | Structured version Visualization version GIF version |
Description: Membership of the empty set in an infinite Cartesian product. (Contributed by Steve Rodriguez, 29-Sep-2006.) |
Ref | Expression |
---|---|
0elixp | ⊢ ∅ ∈ X𝑥 ∈ ∅ 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0ex 5211 | . . 3 ⊢ ∅ ∈ V | |
2 | 1 | snid 4601 | . 2 ⊢ ∅ ∈ {∅} |
3 | ixp0x 8490 | . 2 ⊢ X𝑥 ∈ ∅ 𝐴 = {∅} | |
4 | 2, 3 | eleqtrri 2912 | 1 ⊢ ∅ ∈ X𝑥 ∈ ∅ 𝐴 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 ∅c0 4291 {csn 4567 Xcixp 8461 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-br 5067 df-opab 5129 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-fun 6357 df-fn 6358 df-ixp 8462 |
This theorem is referenced by: (None) |
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