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| Mirrors > Home > MPE Home > Th. List > xaddcl | Structured version Visualization version GIF version | ||
| Description: The extended real addition operation is closed in extended reals. (Contributed by Mario Carneiro, 20-Aug-2015.) |
| Ref | Expression |
|---|---|
| xaddcl | ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 +𝑒 𝐵) ∈ ℝ*) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xaddf 13354 | . 2 ⊢ +𝑒 :(ℝ* × ℝ*)⟶ℝ* | |
| 2 | 1 | fovcl 7548 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 +𝑒 𝐵) ∈ ℝ*) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∈ wcel 2145 (class class class)co 7420 ℝ*cxr 11342 +𝑒 cxad 13239 |
| 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 7751 ax-cnex 11256 ax-1cn 11258 ax-addrcl 11261 ax-rnegex 11271 ax-cnre 11273 |
| 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-ral 3078 df-rex 3088 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-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-id 5546 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-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1st 8001 df-2nd 8002 df-pnf 11345 df-mnf 11346 df-xr 11347 df-xadd 13242 |
| This theorem is used by: xaddass 13379 xaddass2 13380 xleadd1a 13383 xleadd1 13385 xltadd1 13386 xaddge0 13388 xle2add 13389 xlt2add 13390 xsubge0 13391 xposdif 13392 xlesubadd 13393 xadddi 13425 xadddir 13426 xadddi2 13427 xadddi2r 13428 xaddcld 13431 ge0xaddcl 13593 xrsmgm 21713 xrsds 21716 xrs1mnd 21746 xrsxmet 25129 xrofsup 33359 supxrgelem 46348 caragenel2d 47541 |
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