Algebraic and Analytic Methods - 1.13 Differential Equations

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1.13.E2 w ( z ) = A w 1 ( z ) + B w 2 ( z ) 𝑤 𝑧 𝐴 subscript 𝑤 1 𝑧 𝐵 subscript 𝑤 2 𝑧 {\displaystyle{\displaystyle w(z)=Aw_{1}(z)+Bw_{2}(z)}}
w(z) = Aw_{1}(z)+Bw_{2}(z)

w(z) = Aw[1](z)+ Bw[2](z)
w[z] == Subscript[Aw, 1][z]+ Subscript[Bw, 2][z]
Skipped - no semantic math Skipped - no semantic math - -
1.13#Ex1 w 1 ( z 0 ) = 1 subscript 𝑤 1 subscript 𝑧 0 1 {\displaystyle{\displaystyle w_{1}(z_{0})=1}}
w_{1}(z_{0}) = 1

w[1](z[0]) = 1
Subscript[w, 1][Subscript[z, 0]] == 1
Skipped - no semantic math Skipped - no semantic math - -
1.13#Ex3 w 2 ( z 0 ) = 0 subscript 𝑤 2 subscript 𝑧 0 0 {\displaystyle{\displaystyle w_{2}(z_{0})=0}}
w_{2}(z_{0}) = 0

w[2](z[0]) = 0
Subscript[w, 2][Subscript[z, 0]] == 0
Skipped - no semantic math Skipped - no semantic math - -
1.13.E6 A w 1 ( z ) + B w 2 ( z ) = 0 𝐴 subscript 𝑤 1 𝑧 𝐵 subscript 𝑤 2 𝑧 0 {\displaystyle{\displaystyle Aw_{1}(z)+Bw_{2}(z)=0}}
Aw_{1}(z)+Bw_{2}(z) = 0

Aw[1](z)+ Bw[2](z) = 0
Subscript[Aw, 1][z]+ Subscript[Bw, 2][z] == 0
Skipped - no semantic math Skipped - no semantic math - -
1.13.E9 w ( z ) = w 0 ( z ) + A w 1 ( z ) + B w 2 ( z ) 𝑤 𝑧 subscript 𝑤 0 𝑧 𝐴 subscript 𝑤 1 𝑧 𝐵 subscript 𝑤 2 𝑧 {\displaystyle{\displaystyle w(z)=w_{0}(z)+Aw_{1}(z)+Bw_{2}(z)}}
w(z) = w_{0}(z)+Aw_{1}(z)+Bw_{2}(z)

w(z) = w[0](z)+ Aw[1](z)+ Bw[2](z)
w[z] == Subscript[w, 0][z]+ Subscript[Aw, 1][z]+ Subscript[Bw, 2][z]
Skipped - no semantic math Skipped - no semantic math - -
1.13.E10 w 0 ( z ) = w 2 ( z ) w 1 ( z ) r ( z ) 𝒲 { w 1 ( z ) , w 2 ( z ) } d z - w 1 ( z ) w 2 ( z ) r ( z ) 𝒲 { w 1 ( z ) , w 2 ( z ) } d z subscript 𝑤 0 𝑧 subscript 𝑤 2 𝑧 subscript 𝑤 1 𝑧 𝑟 𝑧 Wronskian subscript 𝑤 1 𝑧 subscript 𝑤 2 𝑧 𝑧 subscript 𝑤 1 𝑧 subscript 𝑤 2 𝑧 𝑟 𝑧 Wronskian subscript 𝑤 1 𝑧 subscript 𝑤 2 𝑧 𝑧 {\displaystyle{\displaystyle w_{0}(z)=w_{2}(z)\int\frac{w_{1}(z)r(z)}{\mathscr% {W}\left\{w_{1}(z),w_{2}(z)\right\}}\mathrm{d}z-w_{1}(z)\int\frac{w_{2}(z)r(z)% }{\mathscr{W}\left\{w_{1}(z),w_{2}(z)\right\}}\mathrm{d}z}}
w_{0}(z) = w_{2}(z)\int\frac{w_{1}(z)r(z)}{\Wronskian@{w_{1}(z),w_{2}(z)}}\diff{z}-w_{1}(z)\int\frac{w_{2}(z)r(z)}{\Wronskian@{w_{1}(z),w_{2}(z)}}\diff{z}

w[0](z) = w[2](z)* int((w[1](z)* r(z))/((w[1](z))*diff(w[2](z), z)-diff(w[1](z), z)*(w[2](z))), z)- w[1](z)* int((w[2](z)* r(z))/((w[1](z))*diff(w[2](z), z)-diff(w[1](z), z)*(w[2](z))), z)
Subscript[w, 0][z] == Subscript[w, 2][z]* Integrate[Divide[Subscript[w, 1][z]* r[z],Wronskian[{Subscript[w, 1][z], Subscript[w, 2][z]}, z]], z, GenerateConditions->None]- Subscript[w, 1][z]* Integrate[Divide[Subscript[w, 2][z]* r[z],Wronskian[{Subscript[w, 1][z], Subscript[w, 2][z]}, z]], z, GenerateConditions->None]
Translation Error Translation Error - -
1.13#Ex5 W ( ξ ) = w ( 1 ξ ) 𝑊 𝜉 𝑤 1 𝜉 {\displaystyle{\displaystyle W(\xi)=w\left(\frac{1}{\xi}\right)}}
W(\xi) = w\left(\frac{1}{\xi}\right)

W(xi) = w((1)/(xi))
W[\[Xi]] == w[Divide[1,\[Xi]]]
Skipped - no semantic math Skipped - no semantic math - -
1.13#Ex8 d 2 U d z 2 + I U = 0 derivative 𝑈 𝑧 2 𝐼 𝑈 0 {\displaystyle{\displaystyle\frac{{\mathrm{d}}^{2}U}{{\mathrm{d}z}^{2}}+IU=0}}
\deriv[2]{U}{z}+IU = 0

diff(U, [z$(2)])+ I*U = 0
D[U, {z, 2}]+ I*U == 0
Failure Failure
Failed [300 / 300]
Result: .5000000004+.8660254040*I
Test Values: {I = 1/2*3^(1/2)+1/2*I, U = 1/2*3^(1/2)+1/2*I, z = 1/2*3^(1/2)+1/2*I}

Result: .5000000004+.8660254040*I
Test Values: {I = 1/2*3^(1/2)+1/2*I, U = 1/2*3^(1/2)+1/2*I, z = -1/2+1/2*I*3^(1/2)}

Result: .5000000004+.8660254040*I
Test Values: {I = 1/2*3^(1/2)+1/2*I, U = 1/2*3^(1/2)+1/2*I, z = 1/2-1/2*I*3^(1/2)}

Result: .5000000004+.8660254040*I
Test Values: {I = 1/2*3^(1/2)+1/2*I, U = 1/2*3^(1/2)+1/2*I, z = -1/2*3^(1/2)-1/2*I}

... skip entries to safe data
Failed [210 / 210]
Result: Complex[0.8660254037844387, 0.49999999999999994]
Test Values: {Rule[Complex[0, 1], 1], Rule[U, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]], Rule[z, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]]}

Result: Complex[1.7320508075688774, 0.9999999999999999]
Test Values: {Rule[Complex[0, 1], 2], Rule[U, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]], Rule[z, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]]}

... skip entries to safe data
1.13#Ex9 d 2 V d z 2 + J V = 0 derivative 𝑉 𝑧 2 𝐽 𝑉 0 {\displaystyle{\displaystyle\frac{{\mathrm{d}}^{2}V}{{\mathrm{d}z}^{2}}+JV=0}}
\deriv[2]{V}{z}+JV = 0

diff(V, [z$(2)])+ J*V = 0
D[V, {z, 2}]+ J*V == 0
Failure Failure
Failed [300 / 300]
Result: .5000000004+.8660254040*I
Test Values: {J = 1/2*3^(1/2)+1/2*I, V = 1/2*3^(1/2)+1/2*I, z = 1/2*3^(1/2)+1/2*I}

Result: .5000000004+.8660254040*I
Test Values: {J = 1/2*3^(1/2)+1/2*I, V = 1/2*3^(1/2)+1/2*I, z = -1/2+1/2*I*3^(1/2)}

Result: .5000000004+.8660254040*I
Test Values: {J = 1/2*3^(1/2)+1/2*I, V = 1/2*3^(1/2)+1/2*I, z = 1/2-1/2*I*3^(1/2)}

Result: .5000000004+.8660254040*I
Test Values: {J = 1/2*3^(1/2)+1/2*I, V = 1/2*3^(1/2)+1/2*I, z = -1/2*3^(1/2)-1/2*I}

... skip entries to safe data
Failed [300 / 300]
Result: Complex[0.5000000000000001, 0.8660254037844386]
Test Values: {Rule[J, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]], Rule[V, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]], Rule[z, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]]}

Result: Complex[0.5000000000000001, 0.8660254037844386]
Test Values: {Rule[J, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]], Rule[V, Power[E, Times[Complex[0, Rational[1, 6]], Pi]]], Rule[z, Power[E, Times[Complex[0, Rational[2, 3]], Pi]]]}

... skip entries to safe data