Theorem blininf 14009

Description: The intersection of two balls with the same center is the smaller of them. (Contributed by NM, 1-Sep-2006.) (Revised by Mario Carneiro, 12-Nov-2013.)

Assertion

Ref	Expression
blininf	|- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( ( P ( ball ` D ) R ) i^i ( P ( ball ` D ) S ) ) = ( P ( ball ` D )inf ( { R , S } , RR* , < ) ) )

Proof of Theorem blininf

Dummy variable x is distinct from all other variables.

Step	Hyp	Ref	Expression
1		xmetcl 13937	. . . . . . 7 |- ( ( D e. ( *Met ` X ) /\ P e. X /\ x e. X ) -> ( P D x ) e. RR* )
2	1	3expa 1203	. . . . . 6 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ x e. X ) -> ( P D x ) e. RR* )
3	2	adantlr 477	. . . . 5 |- ( ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) /\ x e. X ) -> ( P D x ) e. RR* )
4		simplrl 535	. . . . 5 |- ( ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) /\ x e. X ) -> R e. RR* )
5		simplrr 536	. . . . 5 |- ( ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) /\ x e. X ) -> S e. RR* )
6		xrltmininf 11280	. . . . 5 |- ( ( ( P D x ) e. RR* /\ R e. RR* /\ S e. RR* ) -> ( ( P D x ) < inf ( { R , S } , RR* , < ) <-> ( ( P D x ) < R /\ ( P D x ) < S ) ) )
7	3, 4, 5, 6	syl3anc 1238	. . . 4 |- ( ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) /\ x e. X ) -> ( ( P D x ) < inf ( { R , S } , RR* , < ) <-> ( ( P D x ) < R /\ ( P D x ) < S ) ) )
8	7	pm5.32da 452	. . 3 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( ( x e. X /\ ( P D x ) < inf ( { R , S } , RR* , < ) ) <-> ( x e. X /\ ( ( P D x ) < R /\ ( P D x ) < S ) ) ) )
9		xrmincl 11276	. . . 4 |- ( ( R e. RR* /\ S e. RR* ) -> inf ( { R , S } , RR* , < ) e. RR* )
10		elbl 13976	. . . . 5 |- ( ( D e. ( *Met ` X ) /\ P e. X /\ inf ( { R , S } , RR* , < ) e. RR* ) -> ( x e. ( P ( ball ` D )inf ( { R , S } , RR* , < ) ) <-> ( x e. X /\ ( P D x ) < inf ( { R , S } , RR* , < ) ) ) )
11	10	3expa 1203	. . . 4 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ inf ( { R , S } , RR* , < ) e. RR* ) -> ( x e. ( P ( ball ` D )inf ( { R , S } , RR* , < ) ) <-> ( x e. X /\ ( P D x ) < inf ( { R , S } , RR* , < ) ) ) )
12	9, 11	sylan2 286	. . 3 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( x e. ( P ( ball ` D )inf ( { R , S } , RR* , < ) ) <-> ( x e. X /\ ( P D x ) < inf ( { R , S } , RR* , < ) ) ) )
13		elbl 13976	. . . . . . 7 |- ( ( D e. ( *Met ` X ) /\ P e. X /\ R e. RR* ) -> ( x e. ( P ( ball ` D ) R ) <-> ( x e. X /\ ( P D x ) < R ) ) )
14	13	3expa 1203	. . . . . 6 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ R e. RR* ) -> ( x e. ( P ( ball ` D ) R ) <-> ( x e. X /\ ( P D x ) < R ) ) )
15	14	adantrr 479	. . . . 5 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( x e. ( P ( ball ` D ) R ) <-> ( x e. X /\ ( P D x ) < R ) ) )
16		elbl 13976	. . . . . . 7 |- ( ( D e. ( *Met ` X ) /\ P e. X /\ S e. RR* ) -> ( x e. ( P ( ball ` D ) S ) <-> ( x e. X /\ ( P D x ) < S ) ) )
17	16	3expa 1203	. . . . . 6 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ S e. RR* ) -> ( x e. ( P ( ball ` D ) S ) <-> ( x e. X /\ ( P D x ) < S ) ) )
18	17	adantrl 478	. . . . 5 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( x e. ( P ( ball ` D ) S ) <-> ( x e. X /\ ( P D x ) < S ) ) )
19	15, 18	anbi12d 473	. . . 4 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( ( x e. ( P ( ball ` D ) R ) /\ x e. ( P ( ball ` D ) S ) ) <-> ( ( x e. X /\ ( P D x ) < R ) /\ ( x e. X /\ ( P D x ) < S ) ) ) )
20		elin 3320	. . . 4 |- ( x e. ( ( P ( ball ` D ) R ) i^i ( P ( ball ` D ) S ) ) <-> ( x e. ( P ( ball ` D ) R ) /\ x e. ( P ( ball ` D ) S ) ) )
21		anandi 590	. . . 4 |- ( ( x e. X /\ ( ( P D x ) < R /\ ( P D x ) < S ) ) <-> ( ( x e. X /\ ( P D x ) < R ) /\ ( x e. X /\ ( P D x ) < S ) ) )
22	19, 20, 21	3bitr4g 223	. . 3 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( x e. ( ( P ( ball ` D ) R ) i^i ( P ( ball ` D ) S ) ) <-> ( x e. X /\ ( ( P D x ) < R /\ ( P D x ) < S ) ) ) )
23	8, 12, 22	3bitr4rd 221	. 2 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( x e. ( ( P ( ball ` D ) R ) i^i ( P ( ball ` D ) S ) ) <-> x e. ( P ( ball ` D )inf ( { R , S } , RR* , < ) ) ) )
24	23	eqrdv 2175	1 |- ( ( ( D e. ( *Met ` X ) /\ P e. X ) /\ ( R e. RR* /\ S e. RR* ) ) -> ( ( P ( ball ` D ) R ) i^i ( P ( ball ` D ) S ) ) = ( P ( ball ` D )inf ( { R , S } , RR* , < ) ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1353   e. wcel 2148   i^i cin 3130   {cpr 3595   class class class wbr 4005   ` cfv 5218  (class class class)co 5877  infcinf 6984   RR*cxr 7993   < clt 7994   *Metcxmet 13525   ballcbl 13527

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-coll 4120  ax-sep 4123  ax-nul 4131  ax-pow 4176  ax-pr 4211  ax-un 4435  ax-setind 4538  ax-iinf 4589  ax-cnex 7904  ax-resscn 7905  ax-1cn 7906  ax-1re 7907  ax-icn 7908  ax-addcl 7909  ax-addrcl 7910  ax-mulcl 7911  ax-mulrcl 7912  ax-addcom 7913  ax-mulcom 7914  ax-addass 7915  ax-mulass 7916  ax-distr 7917  ax-i2m1 7918  ax-0lt1 7919  ax-1rid 7920  ax-0id 7921  ax-rnegex 7922  ax-precex 7923  ax-cnre 7924  ax-pre-ltirr 7925  ax-pre-ltwlin 7926  ax-pre-lttrn 7927  ax-pre-apti 7928  ax-pre-ltadd 7929  ax-pre-mulgt0 7930  ax-pre-mulext 7931  ax-arch 7932  ax-caucvg 7933

This theorem depends on definitions:  df-bi 117  df-dc 835  df-3or 979  df-3an 980  df-tru 1356  df-fal 1359  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ne 2348  df-nel 2443  df-ral 2460  df-rex 2461  df-reu 2462  df-rmo 2463  df-rab 2464  df-v 2741  df-sbc 2965  df-csb 3060  df-dif 3133  df-un 3135  df-in 3137  df-ss 3144  df-nul 3425  df-if 3537  df-pw 3579  df-sn 3600  df-pr 3601  df-op 3603  df-uni 3812  df-int 3847  df-iun 3890  df-br 4006  df-opab 4067  df-mpt 4068  df-tr 4104  df-id 4295  df-po 4298  df-iso 4299  df-iord 4368  df-on 4370  df-ilim 4371  df-suc 4373  df-iom 4592  df-xp 4634  df-rel 4635  df-cnv 4636  df-co 4637  df-dm 4638  df-rn 4639  df-res 4640  df-ima 4641  df-iota 5180  df-fun 5220  df-fn 5221  df-f 5222  df-f1 5223  df-fo 5224  df-f1o 5225  df-fv 5226  df-isom 5227  df-riota 5833  df-ov 5880  df-oprab 5881  df-mpo 5882  df-1st 6143  df-2nd 6144  df-recs 6308  df-frec 6394  df-map 6652  df-sup 6985  df-inf 6986  df-pnf 7996  df-mnf 7997  df-xr 7998  df-ltxr 7999  df-le 8000  df-sub 8132  df-neg 8133  df-reap 8534  df-ap 8541  df-div 8632  df-inn 8922  df-2 8980  df-3 8981  df-4 8982  df-n0 9179  df-z 9256  df-uz 9531  df-rp 9656  df-xneg 9774  df-seqfrec 10448  df-exp 10522  df-cj 10853  df-re 10854  df-im 10855  df-rsqrt 11009  df-abs 11010  df-psmet 13532  df-xmet 13533  df-bl 13535

This theorem is referenced by:  blin2  14017