ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  8re GIF version

Theorem 8re 9398
Description: The number 8 is real. (Contributed by NM, 27-May-1999.)
Assertion
Ref Expression
8re 8 ∈ ℝ

Proof of Theorem 8re
StepHypRef Expression
1 df-8 9378 . 2 8 = (7 + 1)
2 7re 9396 . . 3 7 ∈ ℝ
3 1re 8331 . . 3 1 ∈ ℝ
42, 3readdcli 8345 . 2 (7 + 1) ∈ ℝ
51, 4eqeltri 2311 1 8 ∈ ℝ
Colors of variables:    wff set class
This proof depends on syntax axioms:   ∈ wcel 2209  (class class class)co 6088  ℝcr 8184  1c1 8186   + caddc 8188  7c7 9369  8c8 9370
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1500  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-4 1563  ax-17 1579  ax-ial 1587  ax-ext 2220  ax-1re 8279  ax-addrcl 8282
This proof depends on definitions:  df-bi 117  df-cleq 2231  df-clel 2234  df-2 9372  df-3 9373  df-4 9374  df-5 9375  df-6 9376  df-7 9377  df-8 9378
This theorem is used by:  8cn  9399  9re  9400  9pos  9417  6lt8  9507  5lt8  9508  4lt8  9509  3lt8  9510  2lt8  9511  1lt8  9512  8lt9  9513  7lt9  9514  8th4div3  9535  8lt10  9923  7lt10  9924  ef01bndlem  12547  cos2bnd  12551  slotstnscsi  13607  slotsdnscsi  13635  chtqub  16313  bposlem8  16335  bposlem9  16336  2lgsoddprmlem1  16446  2lgsoddprmlem2  16447  2lgsoddprmlem3a  16448  2lgsoddprmlem3b  16449  2lgsoddprmlem3c  16450  2lgsoddprmlem3d  16451
  Copyright terms: Public domain W3C validator