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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 9962 | . 2 ⊢ ℝ ⊆ ℝ* | |
2 | xpss12 5148 | . 2 ⊢ ((ℝ ⊆ ℝ* ∧ ℝ ⊆ ℝ*) → (ℝ × ℝ) ⊆ (ℝ* × ℝ*)) | |
3 | 1, 1, 2 | mp2an 704 | 1 ⊢ (ℝ × ℝ) ⊆ (ℝ* × ℝ*) |
Colors of variables: wff setvar class |
Syntax hints: ⊆ wss 3540 × cxp 5036 ℝcr 9814 ℝ*cxr 9952 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-v 3175 df-un 3545 df-in 3547 df-ss 3554 df-opab 4644 df-xp 5044 df-xr 9957 |
This theorem is referenced by: ltrelxr 9978 xrsdsre 22421 ovolfioo 23043 ovolficc 23044 ovolficcss 23045 ovollb 23054 ovolicc2 23097 ovolfs2 23145 uniiccdif 23152 uniioovol 23153 uniiccvol 23154 uniioombllem2 23157 uniioombllem3a 23158 uniioombllem3 23159 uniioombllem4 23160 uniioombllem5 23161 uniioombl 23163 dyadmbllem 23173 opnmbllem 23175 icoreresf 32376 icoreelrn 32385 relowlpssretop 32388 opnmbllem0 32615 mblfinlem1 32616 mblfinlem2 32617 voliooicof 38889 ovolval3 39537 ovolval4lem2 39540 ovolval5lem2 39543 ovolval5lem3 39544 ovnovollem1 39546 ovnovollem2 39547 |
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