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| Mirrors > Home > ILE Home > Th. List > disjsnxp | GIF version | ||
| Description: The sets in the cartesian product of singletons with other sets, are disjoint. (Contributed by Glauco Siliprandi, 11-Oct-2020.) |
| Ref | Expression |
|---|---|
| disjsnxp | ⊢ Disj 𝑗 ∈ 𝐴 ({𝑗} × 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sndisj 4029 | . . . 4 ⊢ Disj 𝑗 ∈ 𝐴 {𝑗} | |
| 2 | 1 | a1i 9 | . . 3 ⊢ (⊤ → Disj 𝑗 ∈ 𝐴 {𝑗}) |
| 3 | 2 | disjxp1 6294 | . 2 ⊢ (⊤ → Disj 𝑗 ∈ 𝐴 ({𝑗} × 𝐵)) |
| 4 | 3 | mptru 1373 | 1 ⊢ Disj 𝑗 ∈ 𝐴 ({𝑗} × 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: ⊤wtru 1365 {csn 3622 Disj wdisj 4010 × cxp 4661 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4151 ax-pow 4207 ax-pr 4242 ax-un 4468 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-rmo 2483 df-v 2765 df-sbc 2990 df-csb 3085 df-un 3161 df-in 3163 df-ss 3170 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-disj 4011 df-br 4034 df-opab 4095 df-mpt 4096 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-rn 4674 df-iota 5219 df-fun 5260 df-fn 5261 df-f 5262 df-fo 5264 df-fv 5266 df-1st 6198 |
| This theorem is referenced by: fsum2dlemstep 11599 fisumcom2 11603 fprod2dlemstep 11787 fprodcom2fi 11791 |
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