theory Why3_Real
imports
Why3_Setup
Complex_Main
"HOL-Decision_Procs.Approximation"
begin
section {* Real numbers and the basic unary and binary operators *}
why3_open "real/Real.xml"
why3_vc infix_lseq_def by auto
why3_vc Assoc by auto
why3_vc Unit_def_l by auto
why3_vc Unit_def_r by auto
why3_vc Inv_def_l by auto
why3_vc Inv_def_r by auto
why3_vc Comm by simp
why3_vc Assoc1 by simp
why3_vc Mul_distr_l by (simp add: Fields.linordered_field_class.sign_simps)
why3_vc Mul_distr_r by (simp add: Rings.comm_semiring_class.distrib)
why3_vc infix_mn_def by auto
why3_vc Comm1 by auto
why3_vc Unitary by auto
why3_vc NonTrivialRing by auto
why3_vc Inverse by (simp add: assms)
why3_vc add_div by (simp add: Fields.division_ring_class.add_divide_distrib)
why3_vc sub_div by (simp add: Fields.division_ring_class.diff_divide_distrib)
why3_vc neg_div by auto
why3_vc assoc_mul_div by auto
why3_vc assoc_div_mul by auto
why3_vc assoc_div_div by auto
why3_vc Refl by auto
why3_vc Trans
using assms
by auto
why3_vc Antisymm
using assms
by auto
why3_vc Total by auto
why3_vc ZeroLessOne by auto
why3_vc CompatOrderAdd
using assms
by auto
why3_vc CompatOrderMult
using assms
by (simp add: Rings.ordered_semiring_class.mult_right_mono)
why3_vc infix_sl_def by (simp add: Real.divide_real_def)
why3_end
section {* Alternative Infix Operators *}
why3_open "real/RealInfix.xml"
why3_end
section {* Absolute Value *}
why3_open "real/Abs.xml"
why3_vc Abs_le by auto
why3_vc Abs_pos by auto
why3_vc Abs_sum by auto
why3_vc abs_def by (simp add: Real.abs_real_def)
why3_vc Abs_prod by (simp add: abs_mult)
why3_vc triangular_inequality by (simp add: Real.abs_real_def)
why3_end
section {* Minimum and Maximum *}
why3_open "real/MinMax.xml"
why3_vc Max_l
using assms
by auto
why3_vc Min_r
using assms
by auto
why3_vc max_def by auto
why3_vc min_def by auto
why3_vc Max_comm by auto
why3_vc Min_comm by auto
why3_vc Max_assoc by auto
why3_vc Min_assoc by auto
why3_end
section {* Injection of integers into reals *}
why3_open "real/FromInt.xml"
constants
from_int = of_int
why3_vc Add by auto
why3_vc Mul by auto
why3_vc Neg by auto
why3_vc One by auto
why3_vc Sub by auto
why3_vc Zero by auto
why3_vc Monotonic using assms by auto
why3_end
section {* Various truncation functions *}
(* truncate: rounds towards zero *)
definition truncate :: "real \ int" where
"truncate x = (if x \ 0 then floor x else ceiling x)"
why3_open "real/Truncate.xml"
constants
truncate = truncate
floor = floor
ceil = ceiling
subsection {* Roundings up and down *}
why3_vc Ceil_up
by (simp_all add: ceiling_correct)
why3_vc Ceil_int by auto
why3_vc Floor_int by auto
why3_vc Floor_down
by (simp_all add: floor_correct [simplified])
why3_vc Ceil_monotonic
using assms
by (simp add:ceiling_mono)
why3_vc Floor_monotonic
using assms
by (simp add:floor_mono)
subsection {* Rounding towards zero *}
why3_vc Real_of_truncate
using floor_correct [of x] ceiling_correct [of x]
by (simp_all add: truncate_def del: of_int_floor_le le_of_int_ceiling)
why3_vc Truncate_int by (simp add: truncate_def)
why3_vc Truncate_up_neg
using assms ceiling_correct [of x]
by (simp_all add: truncate_def)
why3_vc Truncate_down_pos
using assms floor_correct [of x]
by (simp_all add: truncate_def)
why3_vc Truncate_monotonic
using assms
unfolding truncate_def
by (simp add: floor_mono ceiling_mono order_trans [of "\x\" 0 "\y\"])
why3_vc Truncate_monotonic_int1
using assms
by (simp add: truncate_def floor_le_iff ceiling_le_iff)
why3_vc Truncate_monotonic_int2
using assms
by (simp add: truncate_def le_floor_iff le_ceiling_iff)
why3_end
section {* Square and Square Root *}
why3_open "real/Square.xml"
constants
sqrt = sqrt
why3_vc Sqrt_le
using assms
by auto
why3_vc Sqrt_mul by (simp add: NthRoot.real_sqrt_mult)
why3_vc Sqrt_square
using assms
by (simp add: sqr_def)
why3_vc Square_sqrt
using assms
by auto
why3_vc Sqrt_positive
using assms
by auto
why3_end
section {* Exponential and Logarithm *}
why3_open "real/ExpLog.xml"
constants
exp = exp
log = ln
why3_vc Exp_log
using assms
by auto
why3_vc Exp_sum by (simp add: Transcendental.exp_add)
why3_vc Log_exp by auto
why3_vc Log_mul
using assms
by (simp add: Transcendental.ln_mult)
why3_vc Log_one by auto
why3_vc Exp_zero by auto
why3_end
section {* Power of a real to an integer *}
(* TODO: clones int.Exponentiation which is not yet realized *)
why3_open "real/PowerInt.xml"
why3_vc Power_0 by auto
why3_vc Power_1 by auto
why3_vc Power_s
using assms
by (simp add: nat_add_distrib)
why3_vc Power_sum
using assms
by (simp add: nat_add_distrib power_add)
why3_vc Pow_ge_one using assms by auto
why3_vc Power_mult
using assms
by (simp add: nat_mult_distrib power_mult)
why3_vc Power_comm1 by simp
why3_vc Power_comm2 by (simp add: semiring_normalization_rules(30))
why3_vc Power_s_alt
proof -
have "nat n = Suc (nat (n - 1))" using assms by auto
then show ?thesis by simp
qed
why3_end
section {* Power of a real to a real exponent *}
(* TODO: no power to a real exponent in Isabelle? *)
section {* Trigonometric Functions *}
abbreviation (input)
"why3_divide \ divide"
why3_open "real/Trigonometry.xml"
constants
cos = cos
sin = sin
pi = pi
atan = arctan
why3_vc Cos_0 by auto
why3_vc Sin_0 by auto
why3_vc Cos_pi by auto
why3_vc Sin_pi by auto
why3_vc Cos_neg by auto
why3_vc Cos_pi2 by auto
why3_vc Cos_sum by (simp add: Transcendental.cos_add)
why3_vc Sin_neg by auto
why3_vc Sin_pi2 by auto
why3_vc Sin_sum by (simp add: Transcendental.sin_add)
why3_vc tan_def by (simp add: Transcendental.tan_def)
why3_vc Tan_atan by (simp add: Transcendental.tan_arctan)
why3_vc Cos_le_one by auto
why3_vc Sin_le_one by auto
why3_vc Cos_plus_pi by auto
why3_vc Pi_double_precision_bounds
proof -
have "7074237752028440 / 2251799813685248 < pi"
by (approximation 57)
then show ?C1 by simp
have "pi < 7074237752028441 / 2251799813685248"
by (approximation 55)
then show ?C2 by simp
qed
why3_vc Sin_plus_pi by auto
why3_vc Cos_plus_pi2 by (simp add: Transcendental.minus_sin_cos_eq)
why3_vc Sin_plus_pi2 by (simp add: sin_add)
why3_vc Pythagorean_identity
by (simp add: sqr_def)
why3_end
section {* Hyperbolic Functions *}
(* TODO: missing acosh *)
section {* Polar Coordinates *}
(* TODO: missing atan2 *)
end