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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 4043 | . . . 4 ⊢ Disj 𝑗 ∈ 𝐴 {𝑗} | |
| 2 | 1 | a1i 9 | . . 3 ⊢ (⊤ → Disj 𝑗 ∈ 𝐴 {𝑗}) |
| 3 | 2 | disjxp1 6329 | . 2 ⊢ (⊤ → Disj 𝑗 ∈ 𝐴 ({𝑗} × 𝐵)) |
| 4 | 3 | mptru 1382 | 1 ⊢ Disj 𝑗 ∈ 𝐴 ({𝑗} × 𝐵) |
| Colors of variables: wff set class |
| Syntax hints: ⊤wtru 1374 {csn 3634 Disj wdisj 4023 × cxp 4677 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2179 ax-14 2180 ax-ext 2188 ax-sep 4166 ax-pow 4222 ax-pr 4257 ax-un 4484 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2193 df-cleq 2199 df-clel 2202 df-nfc 2338 df-ral 2490 df-rex 2491 df-rmo 2493 df-v 2775 df-sbc 3000 df-csb 3095 df-un 3171 df-in 3173 df-ss 3180 df-pw 3619 df-sn 3640 df-pr 3641 df-op 3643 df-uni 3853 df-disj 4024 df-br 4048 df-opab 4110 df-mpt 4111 df-id 4344 df-xp 4685 df-rel 4686 df-cnv 4687 df-co 4688 df-dm 4689 df-rn 4690 df-iota 5237 df-fun 5278 df-fn 5279 df-f 5280 df-fo 5282 df-fv 5284 df-1st 6233 |
| This theorem is referenced by: fsum2dlemstep 11789 fisumcom2 11793 fprod2dlemstep 11977 fprodcom2fi 11981 |
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