Mathlib Map

Theorems · Theorem · logic and foundations

Cardinal.IsRegular.cof_ord

∀ {c : Cardinal.{u_1}}, c.IsRegular → c.ord.cof = c
Defined in
Mathlib.SetTheory.Cardinal.Regular
Cited by
23 results in Mathlib
Foundations
Depth 88 from the axioms · uses propext, Classical.choice, Quot.sound

Around this declaration

Dashed lines are statement dependencies; solid lines are citations in proofs.

Cardinal.IsInaccessible.preBeth_ord · cited by 3IsInaccessible.preBeth_ordCardinal.exists_infinite_fiber · cited by 2Cardinal.exists_infinite_…Cardinal.sum_lt_lift_of_isRegular · cited by 2Cardinal.sum_lt_lift_of_i…Cardinal.infinite_pigeonhole_card_lt · cited by 2Cardinal.infinite_pigeonh…Cardinal.derivFamily_lt_ord_lift · cited by 2Cardinal.derivFamily_lt_o…Cardinal.IsRegular.cof_omega_eq · cited by 2IsRegular.cof_omega_eqCardinal.card_iUnion_lt_iff_forall_of_isRegular · cited by 1Cardinal.card_iUnion_lt_i…CategoryTheory.ObjectProperty.strictLimitsClosureStep_strictLimitsClosureIter_eq_self · cited by 1ObjectProperty.strictLimi…Cardinal.nfpFamily_lt_ord_lift_of_isRegular · cited by 1Cardinal.nfpFamily_lt_ord…Cardinal.exists_uncountable_fiber · cited by 0Cardinal.exists_uncountab…Cardinal.iSup_lt_lift_of_isRegular · cited by 0Cardinal.iSup_lt_lift_of_…Cardinal.iSup_lt_of_isRegular · cited by 0Cardinal.iSup_lt_of_isReg…Cardinal.iSup_lt_ord_lift_of_isRegular · cited by 0Cardinal.iSup_lt_ord_lift…Cardinal.cof_preOmega_add_one · cited by 0Cardinal.cof_preOmega_add…Cardinal.lsub_lt_ord_lift_of_isRegular · cited by 0Cardinal.lsub_lt_ord_lift…Cardinal · cited by 2598CardinalLE.le.antisymm · cited by 507le.antisymmCardinal.IsRegular · cited by 282Cardinal.IsRegularCardinal.ord · cited by 266Cardinal.ordOrdinal.cof · cited by 125Ordinal.cofOrdinal.cof_ord_le · cited by 5Ordinal.cof_ord_leCardinal.IsRegular.le_cof_ord · cited by 4IsRegular.le_cof_ordIsRegular.cof_ordCITED BYCITES

Cites7

Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.

Cited by23

Results whose statement or proof uses this declaration.