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Export ∆ (\increment) and ∑ (\sum) as aliases of Laplacian() and sum() #761

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Export ∆ (\increment) and ∑ (\sum) as aliases of Laplacian() and sum() #761

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072dd74
Define \increment as alias of Laplacian() and export it
wsshin Jan 20, 2022
3635585
Describe in comment how to enter exported unicode symbols
wsshin Jan 20, 2022
da7c8ab
Export ∑ (\sum) as alias for sum()
wsshin Jan 20, 2022
cb2977f
Add unit tests for exported symbols
wsshin Jan 20, 2022
75b3a4a
Add packages in [extras] to make tests succeed
wsshin Jan 20, 2022
fa34125
Do not import ApproxFunOrthogonalPolynomials for tests
wsshin Jan 20, 2022
2561b30
Bump up minor version number
wsshin Jan 21, 2022
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6 changes: 4 additions & 2 deletions Project.toml
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
name = "ApproxFun"
uuid = "28f2ccd6-bb30-5033-b560-165f7b14dc2f"
version = "0.13"
version = "0.13.1"

[deps]
AbstractFFTs = "621f4979-c628-5d54-868e-fcf4e3e8185c"
Expand Down Expand Up @@ -35,8 +35,10 @@ SpecialFunctions = "1.1, 2"
julia = "1.6"

[extras]
DualNumbers = "fa6b7ba4-c1ee-5f82-b5fc-ecf0adba8f74"
Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
SpecialFunctions = "276daf66-3868-5448-9aa4-cd146d93841b"
Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"

[targets]
test = ["Test", "Random"]
test = ["DualNumbers", "Random", "SpecialFunctions", "Test"]
14 changes: 7 additions & 7 deletions src/Extras/poetry.jl
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Expand Up @@ -3,7 +3,7 @@
#####


export chebyshevt, chebyshevu, legendre, ∫, ⨜, ⨍, ChebyshevWeight, 𝕀, 𝕌, 𝒟
export chebyshevt, chebyshevu, legendre, ∫, ⨜, ∑, ⨍, ChebyshevWeight, 𝕀, 𝕌, 𝒟, ∆

## Chebyshev & Legendre polynomials

Expand Down Expand Up @@ -32,7 +32,7 @@ ChebyshevWeight()=ChebyshevWeight(0)
∫(f::Fun)=integrate(f)
⨜(f::Fun)=cumsum(f)

for OP in (:Σ,:∮,:⨍,:⨎)
for OP in (:∑,:∮,:⨍,:⨎) # ∑ entered by \sum<tab>, not \Sigma<tab>
@eval $OP(f::Fun)=sum(f)
end

Expand All @@ -43,9 +43,9 @@ cross(∇::Function,F::Vector{M}) where {M<:MultivariateFun} = curl(F)

## Domains

const 𝕀 = ChebyshevInterval()
const ℝ = Line()
const 𝕌 = Circle()
const 𝕀 = ChebyshevInterval() # \bbI<tab>
const ℝ = Line() # \bbR<tab>
const 𝕌 = Circle() # \bbU<tab>

𝒟 = Derivative()
Δ = Laplacian()
𝒟 = Derivative() # \scrD<tab>
∆ = Laplacian() # \increment<tab>, not \Delta<tab>
6 changes: 6 additions & 0 deletions test/ExtrasTest.jl
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Expand Up @@ -2,6 +2,12 @@ using ApproxFun, Test, DualNumbers
import ApproxFun: eigs

@testset "Extras" begin
@testset "Exported symbols" begin
f = Fun()
@test ∑(f)==sum(f)==0
@test ∆ == Laplacian()
end

@testset "Dual numbers" begin
@test dual(1.5,1) ∈ Segment(dual(1.0,1),dual(2.0))

Expand Down
2 changes: 1 addition & 1 deletion test/NumberTypeTest.jl
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@@ -1,4 +1,4 @@
using ApproxFun, ApproxFunOrthogonalPolynomials, Test
using ApproxFun, Test

@testset "BigFloat" begin
@testset "BigFloat constructor" begin
Expand Down