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Add DiagTrav in 3D to rectangle example #215

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Add DiagTrav in 3D to rectangle example #215

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2b7a219
Update rectangle.jl
Jpunter16 Mar 5, 2026
99e2cdf
Update rectangle.jl
Jpunter16 Mar 5, 2026
a301fb2
Update rectangle.jl
Jpunter16 Mar 5, 2026
5048c30
Add function to check DiagTrav in 3D
Jpunter16 Mar 5, 2026
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22 changes: 17 additions & 5 deletions examples/rectangle.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -61,8 +61,20 @@ C = Pl * F # coefficient 3-array in tensor basis


c = DiagTrav(C) # arrange by total degree
# ret = 0.0
# for n=0:N-1, k=0:n, j=0:n-k
# ret += c[Block(n+1)[k+1]] * P[0.1,n-k-j + 1] * P[0.2,k + 1] * P[0.3,j + 1]
# end
# @test ret ≈ f(0.1,0.2)

function check_DiagTrav3D(c,P)
ret = 0.0
for n=1:N
iter=1
for i=reverse(1:n)
k=0
for j=reverse(1:(n-i+1))
k+=1
ret += c[Block(n)[iter]] * P[0.1,i] * P[0.2,j] * P[0.3,k]
iter+=1
end
end
end
ret
end
@test check_DiagTrav3D(c,P) ≈ f(0.1,0.2,0.3)