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Mirrors > Home > MPE Home > Th. List > sqrt2irr0 | Structured version Visualization version GIF version |
Description: The square root of 2 is an irrational number. (Contributed by AV, 23-Dec-2022.) |
Ref | Expression |
---|---|
sqrt2irr0 | ⊢ (√‘2) ∈ (ℝ ∖ ℚ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sqrt2irr 15956 | . 2 ⊢ (√‘2) ∉ ℚ | |
2 | sqrt2re 15957 | . . . 4 ⊢ (√‘2) ∈ ℝ | |
3 | 2 | a1i 11 | . . 3 ⊢ ((√‘2) ∉ ℚ → (√‘2) ∈ ℝ) |
4 | df-nel 3052 | . . . 4 ⊢ ((√‘2) ∉ ℚ ↔ ¬ (√‘2) ∈ ℚ) | |
5 | 4 | biimpi 215 | . . 3 ⊢ ((√‘2) ∉ ℚ → ¬ (√‘2) ∈ ℚ) |
6 | 3, 5 | eldifd 3903 | . 2 ⊢ ((√‘2) ∉ ℚ → (√‘2) ∈ (ℝ ∖ ℚ)) |
7 | 1, 6 | ax-mp 5 | 1 ⊢ (√‘2) ∈ (ℝ ∖ ℚ) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ∈ wcel 2110 ∉ wnel 3051 ∖ cdif 3889 ‘cfv 6432 ℝcr 10871 2c2 12028 ℚcq 12687 √csqrt 14942 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2015 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2711 ax-sep 5227 ax-nul 5234 ax-pow 5292 ax-pr 5356 ax-un 7582 ax-cnex 10928 ax-resscn 10929 ax-1cn 10930 ax-icn 10931 ax-addcl 10932 ax-addrcl 10933 ax-mulcl 10934 ax-mulrcl 10935 ax-mulcom 10936 ax-addass 10937 ax-mulass 10938 ax-distr 10939 ax-i2m1 10940 ax-1ne0 10941 ax-1rid 10942 ax-rnegex 10943 ax-rrecex 10944 ax-cnre 10945 ax-pre-lttri 10946 ax-pre-lttrn 10947 ax-pre-ltadd 10948 ax-pre-mulgt0 10949 ax-pre-sup 10950 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2072 df-mo 2542 df-eu 2571 df-clab 2718 df-cleq 2732 df-clel 2818 df-nfc 2891 df-ne 2946 df-nel 3052 df-ral 3071 df-rex 3072 df-reu 3073 df-rmo 3074 df-rab 3075 df-v 3433 df-sbc 3721 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4846 df-iun 4932 df-br 5080 df-opab 5142 df-mpt 5163 df-tr 5197 df-id 5490 df-eprel 5496 df-po 5504 df-so 5505 df-fr 5545 df-we 5547 df-xp 5596 df-rel 5597 df-cnv 5598 df-co 5599 df-dm 5600 df-rn 5601 df-res 5602 df-ima 5603 df-pred 6201 df-ord 6268 df-on 6269 df-lim 6270 df-suc 6271 df-iota 6390 df-fun 6434 df-fn 6435 df-f 6436 df-f1 6437 df-fo 6438 df-f1o 6439 df-fv 6440 df-riota 7228 df-ov 7274 df-oprab 7275 df-mpo 7276 df-om 7707 df-1st 7824 df-2nd 7825 df-frecs 8088 df-wrecs 8119 df-recs 8193 df-rdg 8232 df-er 8481 df-en 8717 df-dom 8718 df-sdom 8719 df-sup 9179 df-pnf 11012 df-mnf 11013 df-xr 11014 df-ltxr 11015 df-le 11016 df-sub 11207 df-neg 11208 df-div 11633 df-nn 11974 df-2 12036 df-3 12037 df-n0 12234 df-z 12320 df-uz 12582 df-q 12688 df-rp 12730 df-seq 13720 df-exp 13781 df-cj 14808 df-re 14809 df-im 14810 df-sqrt 14944 df-abs 14945 |
This theorem is referenced by: 2irrexpq 25883 2irrexpqALT 25948 |
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