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Mirrors > Home > MPE Home > Th. List > xaddcld | Structured version Visualization version GIF version |
Description: The extended real addition operation is closed in extended reals. (Contributed by Mario Carneiro, 28-May-2016.) |
Ref | Expression |
---|---|
xnegcld.1 | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
xaddcld.2 | ⊢ (𝜑 → 𝐵 ∈ ℝ*) |
Ref | Expression |
---|---|
xaddcld | ⊢ (𝜑 → (𝐴 +𝑒 𝐵) ∈ ℝ*) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | xnegcld.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
2 | xaddcld.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ ℝ*) | |
3 | xaddcl 12635 | . 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 +𝑒 𝐵) ∈ ℝ*) | |
4 | 1, 2, 3 | syl2anc 586 | 1 ⊢ (𝜑 → (𝐴 +𝑒 𝐵) ∈ ℝ*) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2114 (class class class)co 7158 ℝ*cxr 10676 +𝑒 cxad 12508 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-cnex 10595 ax-1cn 10597 ax-addrcl 10600 ax-rnegex 10610 ax-cnre 10612 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-id 5462 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-fv 6365 df-ov 7161 df-oprab 7162 df-mpo 7163 df-1st 7691 df-2nd 7692 df-pnf 10679 df-mnf 10680 df-xr 10681 df-xadd 12511 |
This theorem is referenced by: xadd4d 12699 imasdsf1olem 22985 bldisj 23010 xblss2ps 23013 xblss2 23014 blcld 23117 comet 23125 stdbdxmet 23127 metdstri 23461 metdscnlem 23465 iscau3 23883 xlt2addrd 30484 xrge0addcld 30488 xrge0subcld 30489 xrofsup 30494 xrsmulgzz 30667 xrge0adddir 30681 xrge0adddi 30682 esumle 31319 esumlef 31323 omssubadd 31560 inelcarsg 31571 carsgclctunlem2 31579 carsgclctunlem3 31580 carsgclctun 31581 xle2addd 41611 infrpge 41626 xrlexaddrp 41627 infleinflem1 41645 infleinflem2 41646 limsupgtlem 42065 ismbl3 42278 ismbl4 42285 sge0prle 42690 sge0split 42698 sge0iunmptlemre 42704 sge0xaddlem1 42722 omeunle 42805 carageniuncl 42812 ovnsubaddlem1 42859 hspmbl 42918 ovolval5lem1 42941 |
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