Theorem dfrn6 39431

Description: Alternate definition of range. (Contributed by Peter Mazsa, 1-Aug-2018.)

Assertion

Ref	Expression
dfrn6	⊢ ran 𝑅 = {𝑥 ∣ [𝑥]◡𝑅 ≠ ∅}

Distinct variable group:   𝑥,𝑅

Proof of Theorem dfrn6

Step	Hyp	Ref	Expression
1		df-rn 5666	. 2 ⊢ ran 𝑅 = dom ◡𝑅
2		dfdm6 39430	. 2 ⊢ dom ◡𝑅 = {𝑥 ∣ [𝑥]◡𝑅 ≠ ∅}
3	1, 2	eqtri 2786	1 ⊢ ran 𝑅 = {𝑥 ∣ [𝑥]◡𝑅 ≠ ∅}

This proof depends on syntax axioms:   = wceq 1570  {cab 2741   ≠ wne 2959  ∅c0 4281  ^◡ccnv 5654  dom cdm 5655  ran crn 5656  [cec 8740

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-ext 2735  ax-sep 5252  ax-pr 5395

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ne 2960  df-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4839  df-br 5107  df-opab 5171  df-xp 5661  df-cnv 5663  df-dm 5665  df-rn 5666  df-res 5667  df-ima 5668  df-ec 8744

This theorem is used by:  rnxrn  39544