Merge pull request #849 from ChrisRackauckas/claude/fix-has-concretization-019f2nZ8STSAH5PaVG3PVNep

Remove LUFactorization method for AbstractSciMLOperator

Author: ChrisRackauckas

ext/LinearSolveSparseArraysExt.jl

@@ -300,18 +300,6 @@ function LinearSolve.init_cacheval(
     end
 end
 
-function LinearSolve.init_cacheval(
-        alg::LUFactorization, A::AbstractSciMLOperator, b, u, Pl, Pr,
-        maxiters::Int, abstol, reltol,
-        verbose::Union{LinearVerbosity, Bool}, assumptions::OperatorAssumptions)
-    if has_concretization(A)
-        return LinearSolve.init_cacheval(alg, convert(AbstractMatrix, A), b, u, Pl, Pr,
-            maxiters, abstol, reltol, verbose, assumptions)
-    else
-        nothing
-    end
-end
-
 function LinearSolve.init_cacheval(
         alg::CHOLMODFactorization, A::AbstractSciMLOperator, b, u, Pl, Pr,
         maxiters::Int, abstol, reltol,

test/basictests.jl

@@ -584,11 +584,6 @@ end
         sol_operator = solve(prob_operator, UMFPACKFactorization())
         @test sol_matrix.u ≈ sol_operator.u
 
-        # Test LU with operator
-        sol_matrix = solve(prob_matrix, LUFactorization())
-        sol_operator = solve(prob_operator, LUFactorization())
-        @test sol_matrix.u ≈ sol_operator.u
-
         # Test WOperator with sparse Jacobian
         n_w = 8
         M = sparse(I(n_w) * 1.0)
@@ -612,11 +607,6 @@ end
         sol_woperator = solve(prob_woperator, UMFPACKFactorization())
         sol_wmatrix = solve(prob_wmatrix, UMFPACKFactorization())
         @test sol_woperator.u ≈ sol_wmatrix.u
-
-        # Test LU with WOperator
-        sol_woperator = solve(prob_woperator, LUFactorization())
-        sol_wmatrix = solve(prob_wmatrix, LUFactorization())
-        @test sol_woperator.u ≈ sol_wmatrix.u
     end
 
     @testset "Solve Function" begin