File matrixlp.ML


(*  Title:      HOL/Matrix/cplex/matrixlp.ML
Author: Steven Obua
*)

signature MATRIX_LP =
sig
val lp_dual_estimate_prt : string -> int -> thm
val lp_dual_estimate_prt_primitive :
cterm * (cterm * cterm) * (cterm * cterm) * cterm * (cterm * cterm) -> thm
val matrix_compute : cterm -> thm
val matrix_simplify : thm -> thm
val prove_bound : string -> int -> thm
val float2real : string * string -> Real.real
end

structure MatrixLP : MATRIX_LP =
struct

fun inst_real thm =
let val certT = ctyp_of (Thm.theory_of_thm thm) in
Drule.export_without_context (Thm.instantiate
([(certT (TVar (hd (OldTerm.term_tvars (prop_of thm)))), certT HOLogic.realT)], []) thm)
end

local

val cert = cterm_of @{theory}

in

fun lp_dual_estimate_prt_primitive (y, (A1, A2), (c1, c2), b, (r1, r2)) =
let
val th = inst_real @{thm "spm_mult_le_dual_prts_no_let"}
fun var s x = (cert (Var ((s,0), FloatSparseMatrixBuilder.spmatT)), x)
val th = Thm.instantiate ([], [var "A1" A1, var "A2" A2, var "y" y, var "c1" c1, var "c2" c2,
var "r1" r1, var "r2" r2, var "b" b]) th
in th end

fun lp_dual_estimate_prt lptfile prec =
let
val certificate =
let
open Fspmlp
val l = load lptfile prec false
in
(y l |> cert, A l |> pairself cert, c l |> pairself cert, b l |> cert, r12 l |> pairself cert)
end
in
lp_dual_estimate_prt_primitive certificate
end

end

fun prep ths = ComputeHOL.prep_thms ths

fun inst_tvar ty thm =
let
val certT = Thm.ctyp_of (Thm.theory_of_thm thm);
val ord = prod_ord (prod_ord string_ord int_ord) (list_ord string_ord)
val v = TVar (hd (sort ord (OldTerm.term_tvars (prop_of thm))))
in
Drule.export_without_context (Thm.instantiate ([(certT v, certT ty)], []) thm)
end

fun inst_tvars [] thms = thms
| inst_tvars (ty::tys) thms = inst_tvars tys (map (inst_tvar ty) thms)

local
val ths = ComputeHOL.prep_thms @{thms "ComputeHOL.compute_list_case" "ComputeHOL.compute_let"
"ComputeHOL.compute_if" "ComputeFloat.arith" "SparseMatrix.sparse_row_matrix_arith_simps"
"ComputeHOL.compute_bool" "ComputeHOL.compute_pair"
"SparseMatrix.sorted_sp_simps" "ComputeNumeral.number_norm"
"ComputeNumeral.natnorm"};
val computer = PCompute.make Compute.SML @{theory} ths []
in

fun matrix_compute c = hd (PCompute.rewrite computer [c])

end

fun matrix_simplify th =
let
val simp_th = matrix_compute (cprop_of th)
val th = Thm.strip_shyps (Thm.equal_elim simp_th th)
fun removeTrue th = removeTrue (Thm.implies_elim th TrueI) handle _ => th (* FIXME avoid handle _ *)
in
removeTrue th
end

fun prove_bound lptfile prec =
let
val th = lp_dual_estimate_prt lptfile prec
in
matrix_simplify th
end

val realFromStr = the o Real.fromString;
fun float2real (x, y) = realFromStr x * Math.pow (2.0, realFromStr y);

end