Theorems · Theorem · real analysis
Real.quadratic_root_cos_pi_div_five
4 * Real.cos (Real.pi / 5) ^ 2 - 2 * Real.cos (Real.pi / 5) - 1 = 0
- Cited by
- 2 results in Mathlib
- Foundations
- Depth 178 from the axioms · uses propext, Classical.choice, Quot.sound
Around this declaration
Dashed lines are statement dependencies; solid lines are citations in proofs.
Cites26
Mathlib declarations this one mentions in its statement or cites explicitly in its proof. Plumbing is filtered out.
- Realstatement and proof · cited by 25,697
- mul_oneproof · cited by 3,885
- one_mulproof · cited by 2,841
- Nat.cast_oneproof · cited by 2,501
- mul_commproof · cited by 2,262
- Nat.cast_zeroproof · cited by 1,870
- Real.pistatement and proof · cited by 1,774
- mul_assocproof · cited by 1,667
- sub_selfproof · cited by 996
- one_ne_zeroproof · cited by 885
- ne_of_gtproof · cited by 637
- div_oneproof · cited by 629
Cited by2
Results whose statement or proof uses this declaration.
- Real.cos_pi_div_fiveproof · cited by 0
- Real.Polynomial.isRoot_cos_pi_div_fiveproof · cited by 0