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Related theorems Unicode version |
| Description: The norm of non-zero vector is positive. |
| Ref | Expression |
|---|---|
| normgt0tOLD |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sqrgt0t 6656 |
. . . . 5
| |
| 2 | hiidrclt 8916 |
. . . . . 6
| |
| 3 | 2 | adantr 389 |
. . . . 5
|
| 4 | ax-his4 8907 |
. . . . . 6
| |
| 5 | df-ne 1585 |
. . . . . 6
| |
| 6 | 4, 5 | sylan2br 453 |
. . . . 5
|
| 7 | 1, 3, 6 | sylanc 471 |
. . . 4
|
| 8 | 7 | ex 373 |
. . 3
|
| 9 | opreq1 3963 |
. . . . . . . . 9
| |
| 10 | hi01t 8917 |
. . . . . . . . 9
| |
| 11 | 9, 10 | sylan9eqr 1527 |
. . . . . . . 8
|
| 12 | 11 | fveq2d 3723 |
. . . . . . 7
|
| 13 | sqr0 6617 |
. . . . . . 7
| |
| 14 | 12, 13 | syl6eq 1521 |
. . . . . 6
|
| 15 | 14 | ex 373 |
. . . . 5
|
| 16 | sqrclt 6655 |
. . . . . . . . 9
| |
| 17 | hiidge0t 8919 |
. . . . . . . . 9
| |
| 18 | 16, 2, 17 | sylanc 471 |
. . . . . . . 8
|
| 19 | 0re 5423 |
. . . . . . . 8
| |
| 20 | 18, 19 | jctir 293 |
. . . . . . 7
|
| 21 | lttri3t 5497 |
. . . . . . 7
| |
| 22 | 20, 21 | syl 10 |
. . . . . 6
|
| 23 | pm3.27 323 |
. . . . . 6
| |
| 24 | 22, 23 | syl6bi 214 |
. . . . 5
|
| 25 | 15, 24 | syld 27 |
. . . 4
|
| 26 | 25 | con2d 91 |
. . 3
|
| 27 | 8, 26 | impbid 515 |
. 2
|
| 28 | normvalt 8945 |
. . 3
| |
| 29 | 28 | breq2d 2626 |
. 2
|
| 30 | 27, 29 | bitr4d 530 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: nmcoplb 9914 lnopcon 9919 nmcfnlb 9943 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 961 ax-gen 962 ax-8 963 ax-9 964 ax-10 965 ax-11 966 ax-12 967 ax-13 968 ax-14 969 ax-17 970 ax-4 972 ax-5o 974 ax-6o 977 ax-9o 1122 ax-10o 1139 ax-16 1209 ax-11o 1217 ax-ext 1458 ax-rep 2689 ax-sep 2699 ax-nul 2706 ax-pow 2738 ax-pr 2775 ax-un 2862 ax-inf2 4608 ax-hv0cl 8828 ax-hvmul0 8835 ax-hfi 8901 ax-his1 8904 ax-his3 8906 ax-his4 8907 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 775 df-3an 776 df-ex 980 df-sb 1171 df-eu 1381 df-mo 1382 df-clab 1463 df-cleq 1468 df-clel 1471 df-ne 1585 df-nel 1586 df-ral 1647 df-rex 1648 df-reu 1649 df-rab 1650 df-v 1809 df-sbc 1939 df-csb 1999 df-dif 2046 df-un 2047 df-in 2048 df-ss 2050 df-pss 2052 df-nul 2278 df-if 2359 df-pw 2399 df-sn 2409 df-pr 2410 df-tp 2412 df-op 2413 df-uni 2500 df-int 2530 df-iun 2564 df-br 2616 df-opab 2663 df-tr 2677 df-eprel 2828 df-id 2831 df-po 2836 df-so 2846 df-fr 2913 df-we 2930 df-ord 2947 df-on 2948 df-lim 2949 df-suc 2950 df-om 3128 df-xp 3180 df-rel 3181 df-cnv 3182 df-co 3183 df-dm 3184 df-rn 3185 df-res 3186 df-ima 3187 df-fun 3188 df-fn 3189 df-f 3190 df-f1 3191 df-fo 3192 df-f1o 3193 df-fv 3194 df-rdg 3927 df-opr 3960 df-oprab 3961 df-1st 4072 df-2nd 4073 df-1o 4126 df-oadd 4128 df-omul 4129 df-er 4254 df-ec 4256 df-qs 4259 df-en 4360 df-dom 4361 df-sdom 4362 df-sup 4557 df-ni 4983 df-pli 4984 df-mi 4985 df-lti 4986 df-plpq 5018 df-mpq 5019 df-enq 5020 df-nq 5021 df-plq 5022 df-mq 5023 df-rq 5024 df-ltq 5025 df-1q 5026 df-np 5069 df-1p 5070 df-plp 5071 df-mp 5072 df-ltp 5073 df-plpr 5147 df-mpr 5148 df-enr 5149 df-nr 5150 df-plr 5151 df-mr 5152 df-ltr 5153 df-0r 5154 df-1r 5155 df-m1r 5156 df-c 5223 df-0 5224 df-1 5225 df-i 5226 df-r 5227 df-plus 5228 df-mul 5229 df-lt 5230 df-sub 5339 df-neg 5341 df-pnf 5470 df-mnf 5471 df-xr 5472 df-ltxr 5473 df-le 5474 df-div 5682 df-sqr 6615 df-re 6697 df-im 6698 df-cj 6699 df-hnorm 8792 |