Theorem iccssre 10189

Description: A closed real interval is a set of reals. (Contributed by FL, 6-Jun-2007.) (Proof shortened by Paul Chapman, 21-Jan-2008.)

Assertion

Ref	Expression
iccssre	|- ( ( A e. RR /\ B e. RR ) -> ( A [,] B ) C_ RR )

Proof of Theorem iccssre

Dummy variable x is distinct from all other variables.

Step	Hyp	Ref	Expression
1		elicc2 10172	. . . . 5 |- ( ( A e. RR /\ B e. RR ) -> ( x e. ( A [,] B ) <-> ( x e. RR /\ A <_ x /\ x <_ B ) ) )
2	1	biimp3a 1381	. . . 4 |- ( ( A e. RR /\ B e. RR /\ x e. ( A [,] B ) ) -> ( x e. RR /\ A <_ x /\ x <_ B ) )
3	2	simp1d 1035	. . 3 |- ( ( A e. RR /\ B e. RR /\ x e. ( A [,] B ) ) -> x e. RR )
4	3	3expia 1231	. 2 |- ( ( A e. RR /\ B e. RR ) -> ( x e. ( A [,] B ) -> x e. RR ) )
5	4	ssrdv 3233	1 |- ( ( A e. RR /\ B e. RR ) -> ( A [,] B ) C_ RR )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 1004   e. wcel 2202   C_ wss 3200   class class class wbr 4088  (class class class)co 6017   RRcr 8030   <_ cle 8214   [,]cicc 10125

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 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-13 2204  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299  ax-un 4530  ax-setind 4635  ax-cnex 8122  ax-resscn 8123  ax-pre-ltirr 8143  ax-pre-ltwlin 8144  ax-pre-lttrn 8145

This theorem depends on definitions:  df-bi 117  df-3or 1005  df-3an 1006  df-tru 1400  df-fal 1403  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ne 2403  df-nel 2498  df-ral 2515  df-rex 2516  df-rab 2519  df-v 2804  df-sbc 3032  df-dif 3202  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-uni 3894  df-br 4089  df-opab 4151  df-id 4390  df-po 4393  df-iso 4394  df-xp 4731  df-rel 4732  df-cnv 4733  df-co 4734  df-dm 4735  df-iota 5286  df-fun 5328  df-fv 5334  df-ov 6020  df-oprab 6021  df-mpo 6022  df-pnf 8215  df-mnf 8216  df-xr 8217  df-ltxr 8218  df-le 8219  df-icc 10129

This theorem is referenced by:  iccsupr  10200  iccshftri  10229  iccshftli  10231  iccdili  10233  icccntri  10235  unitssre  10239  iccen  10240  cos12dec  12328  suplociccreex  15347  suplociccex  15348  dedekindicclemuub  15349  dedekindicclemlu  15353  dedekindicclemeu  15354  dedekindicclemicc  15355  dedekindicc  15356  reeff1olem  15494  cosz12  15503  ioocosf1o  15577