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| Mirrors > Home > MPE Home > Th. List > Mathboxes > omord2lim | Structured version Visualization version GIF version | ||
| Description: Given a limit ordinal, the product of any nonzero ordinal with an ordinal less than that limit ordinal is less than the product of the nonzero ordinal with the limit ordinal . Lemma 3.14 of [Schloeder] p. 9. (Contributed by RP, 29-Jan-2025.) |
| Ref | Expression |
|---|---|
| omord2lim | ⊢ (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) → (𝐵 ∈ 𝐶 → (𝐴 ·o 𝐵) ∈ (𝐴 ·o 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | limord 6375 | . . . . 5 ⊢ (Lim 𝐶 → Ord 𝐶) | |
| 2 | 1 | ad2antrl 735 | . . . 4 ⊢ (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) → Ord 𝐶) |
| 3 | ordelon 6338 | . . . 4 ⊢ ((Ord 𝐶 ∧ 𝐵 ∈ 𝐶) → 𝐵 ∈ On) | |
| 4 | 2, 3 | sylan 587 | . . 3 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) ∧ 𝐵 ∈ 𝐶) → 𝐵 ∈ On) |
| 5 | elex 3454 | . . . . . 6 ⊢ (𝐶 ∈ 𝑉 → 𝐶 ∈ V) | |
| 6 | 1, 5 | anim12i 620 | . . . . 5 ⊢ ((Lim 𝐶 ∧ 𝐶 ∈ 𝑉) → (Ord 𝐶 ∧ 𝐶 ∈ V)) |
| 7 | 6 | ad2antlr 734 | . . . 4 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) ∧ 𝐵 ∈ 𝐶) → (Ord 𝐶 ∧ 𝐶 ∈ V)) |
| 8 | elon2 6325 | . . . 4 ⊢ (𝐶 ∈ On ↔ (Ord 𝐶 ∧ 𝐶 ∈ V)) | |
| 9 | 7, 8 | sylibr 236 | . . 3 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) ∧ 𝐵 ∈ 𝐶) → 𝐶 ∈ On) |
| 10 | simplll 781 | . . 3 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) ∧ 𝐵 ∈ 𝐶) → 𝐴 ∈ On) | |
| 11 | simpr 486 | . . 3 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) ∧ 𝐵 ∈ 𝐶) → 𝐵 ∈ 𝐶) | |
| 12 | on0eln0 6371 | . . . . 5 ⊢ (𝐴 ∈ On → (∅ ∈ 𝐴 ↔ 𝐴 ≠ ∅)) | |
| 13 | 12 | biimpar 479 | . . . 4 ⊢ ((𝐴 ∈ On ∧ 𝐴 ≠ ∅) → ∅ ∈ 𝐴) |
| 14 | 13 | ad2antrr 733 | . . 3 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) ∧ 𝐵 ∈ 𝐶) → ∅ ∈ 𝐴) |
| 15 | omord 8497 | . . . 4 ⊢ ((𝐵 ∈ On ∧ 𝐶 ∈ On ∧ 𝐴 ∈ On) → ((𝐵 ∈ 𝐶 ∧ ∅ ∈ 𝐴) ↔ (𝐴 ·o 𝐵) ∈ (𝐴 ·o 𝐶))) | |
| 16 | 15 | biimpa 478 | . . 3 ⊢ (((𝐵 ∈ On ∧ 𝐶 ∈ On ∧ 𝐴 ∈ On) ∧ (𝐵 ∈ 𝐶 ∧ ∅ ∈ 𝐴)) → (𝐴 ·o 𝐵) ∈ (𝐴 ·o 𝐶)) |
| 17 | 4, 9, 10, 11, 14, 16 | syl32anc 1387 | . 2 ⊢ ((((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) ∧ 𝐵 ∈ 𝐶) → (𝐴 ·o 𝐵) ∈ (𝐴 ·o 𝐶)) |
| 18 | 17 | ex 414 | 1 ⊢ (((𝐴 ∈ On ∧ 𝐴 ≠ ∅) ∧ (Lim 𝐶 ∧ 𝐶 ∈ 𝑉)) → (𝐵 ∈ 𝐶 → (𝐴 ·o 𝐵) ∈ (𝐴 ·o 𝐶))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 397 ∧ w3a 1093 ∈ wcel 2121 ≠ wne 2936 Vcvv 3433 ∅c0 4264 Ord word 6313 Oncon0 6314 Lim wlim 6315 (class class class)co 7360 ·o comu 8397 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1975 ax-7 2016 ax-8 2123 ax-9 2131 ax-10 2154 ax-11 2170 ax-12 2191 ax-ext 2713 ax-rep 5202 ax-sep 5221 ax-nul 5231 ax-pr 5365 ax-un 7682 |
| This theorem depends on definitions: df-bi 209 df-an 398 df-or 855 df-3or 1094 df-3an 1095 df-tru 1551 df-fal 1561 df-ex 1788 df-nf 1792 df-sb 2075 df-mo 2545 df-eu 2575 df-clab 2720 df-cleq 2733 df-clel 2816 df-nfc 2890 df-ne 2937 df-ral 3056 df-rex 3066 df-reu 3347 df-rab 3394 df-v 3435 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4265 df-if 4458 df-pw 4534 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4842 df-iun 4926 df-br 5076 df-opab 5138 df-mpt 5157 df-tr 5183 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-oadd 8403 df-omul 8404 |
| This theorem is referenced by: (None) |
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