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| Mirrors > Home > MPE Home > Th. List > psrbag0 | Structured version Visualization version GIF version | ||
| Description: The empty bag is a bag. (Contributed by Stefan O'Rear, 9-Mar-2015.) |
| Ref | Expression |
|---|---|
| psrbag0.d | ⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} |
| Ref | Expression |
|---|---|
| psrbag0 | ⊢ (𝐼 ∈ 𝑉 → (𝐼 × {0}) ∈ 𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0nn0 12614 | . . . 4 ⊢ 0 ∈ ℕ0 | |
| 2 | 1 | fconst6 6770 | . . 3 ⊢ (𝐼 × {0}):𝐼⟶ℕ0 |
| 3 | c0ex 11293 | . . . . . 6 ⊢ 0 ∈ V | |
| 4 | 3 | fconst 6766 | . . . . 5 ⊢ (𝐼 × {0}):𝐼⟶{0} |
| 5 | incom 4155 | . . . . . 6 ⊢ ({0} ∩ ℕ) = (ℕ ∩ {0}) | |
| 6 | 0nnn 12367 | . . . . . . 7 ⊢ ¬ 0 ∈ ℕ | |
| 7 | disjsn 4672 | . . . . . . 7 ⊢ ((ℕ ∩ {0}) = ∅ ↔ ¬ 0 ∈ ℕ) | |
| 8 | 6, 7 | mpbir 234 | . . . . . 6 ⊢ (ℕ ∩ {0}) = ∅ |
| 9 | 5, 8 | eqtri 2784 | . . . . 5 ⊢ ({0} ∩ ℕ) = ∅ |
| 10 | fimacnvdisj 6758 | . . . . 5 ⊢ (((𝐼 × {0}):𝐼⟶{0} ∧ ({0} ∩ ℕ) = ∅) → (◡(𝐼 × {0}) “ ℕ) = ∅) | |
| 11 | 4, 9, 10 | mp2an 705 | . . . 4 ⊢ (◡(𝐼 × {0}) “ ℕ) = ∅ |
| 12 | 0fi 9063 | . . . 4 ⊢ ∅ ∈ Fin | |
| 13 | 11, 12 | eqeltri 2857 | . . 3 ⊢ (◡(𝐼 × {0}) “ ℕ) ∈ Fin |
| 14 | 2, 13 | pm3.2i 476 | . 2 ⊢ ((𝐼 × {0}):𝐼⟶ℕ0 ∧ (◡(𝐼 × {0}) “ ℕ) ∈ Fin) |
| 15 | psrbag0.d | . . 3 ⊢ 𝐷 = {𝑓 ∈ (ℕ0 ↑m 𝐼) ∣ (◡𝑓 “ ℕ) ∈ Fin} | |
| 16 | 15 | psrbag 22218 | . 2 ⊢ (𝐼 ∈ 𝑉 → ((𝐼 × {0}) ∈ 𝐷 ↔ ((𝐼 × {0}):𝐼⟶ℕ0 ∧ (◡(𝐼 × {0}) “ ℕ) ∈ Fin))) |
| 17 | 14, 16 | mpbiri 261 | 1 ⊢ (𝐼 ∈ 𝑉 → (𝐼 × {0}) ∈ 𝐷) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 {crab 3413 ∩ cin 3898 ∅c0 4279 {csn 4584 × cxp 5649 ◡ccnv 5650 “ cima 5654 ⟶wf 6533 (class class class)co 7418 ↑m cmap 8840 Fincfn 8966 0cc0 11193 ℕcn 12328 ℕ0cn0 12599 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-cnex 11249 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7421 df-oprab 7422 df-mpo 7423 df-om 7876 df-2nd 8000 df-frecs 8292 df-wrecs 8323 df-recs 8372 df-rdg 8411 df-er 8710 df-map 8842 df-en 8967 df-dom 8968 df-sdom 8969 df-fin 8970 df-pnf 11338 df-mnf 11339 df-xr 11340 df-ltxr 11341 df-le 11342 df-nn 12329 df-n0 12600 |
| This theorem is used by: mplascl 22366 subrgasclcl 22369 evlslem1 22384 tdeglem4 26371 mdegle0 26388 psrnzr 34137 |
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