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Mirrors > Home > MPE Home > Th. List > rexpssxrxp | Structured version Visualization version GIF version |
Description: The Cartesian product of standard reals are a subset of the Cartesian product of extended reals (common case). (Contributed by David A. Wheeler, 8-Dec-2018.) |
Ref | Expression |
---|---|
rexpssxrxp | ⊢ (ℝ × ℝ) ⊆ (ℝ* × ℝ*) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ressxr 10083 | . 2 ⊢ ℝ ⊆ ℝ* | |
2 | xpss12 5225 | . 2 ⊢ ((ℝ ⊆ ℝ* ∧ ℝ ⊆ ℝ*) → (ℝ × ℝ) ⊆ (ℝ* × ℝ*)) | |
3 | 1, 1, 2 | mp2an 708 | 1 ⊢ (ℝ × ℝ) ⊆ (ℝ* × ℝ*) |
Colors of variables: wff setvar class |
Syntax hints: ⊆ wss 3574 × cxp 5112 ℝcr 9935 ℝ*cxr 10073 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-v 3202 df-un 3579 df-in 3581 df-ss 3588 df-opab 4713 df-xp 5120 df-xr 10078 |
This theorem is referenced by: ltrelxr 10099 xrsdsre 22613 ovolfioo 23236 ovolficc 23237 ovolficcss 23238 ovollb 23247 ovolicc2 23290 ovolfs2 23339 uniiccdif 23346 uniioovol 23347 uniiccvol 23348 uniioombllem2 23351 uniioombllem3a 23352 uniioombllem3 23353 uniioombllem4 23354 uniioombllem5 23355 uniioombl 23357 dyadmbllem 23367 opnmbllem 23369 icoreresf 33200 icoreelrn 33209 relowlpssretop 33212 opnmbllem0 33445 mblfinlem1 33446 mblfinlem2 33447 voliooicof 40213 ovolval3 40861 ovolval4lem2 40864 ovolval5lem2 40867 ovolval5lem3 40868 ovnovollem1 40870 ovnovollem2 40871 |
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