AppellF2[a,b1,b2,c1,c2,x,y]
是两个变量的阿佩尔超几何函数
.
AppellF2
AppellF2[a,b1,b2,c1,c2,x,y]
是两个变量的阿佩尔超几何函数
.
范例
打开所有单元 关闭所有单元基本范例 (7)
AppellF2[2, 1, 3, 4, 5, 0.6, 0.3]Sum[x^m y^n( Pochhammer[a, m + n]Pochhammer[b1, m] Pochhammer[b2, n]/Pochhammer[c1, m]Pochhammer[c2, n] m! n!), {m, 0, Infinity}, {n, 0, Infinity}]Plot[AppellF2[2, 1, 1 / 2, 1 / 3, 2, 1 / 3, y], {y, -3 / 4, 1 / 4}]Plot[Abs[AppellF2[1 / 2, 1 / 3, 1 / 4, 1 / 5, 1 / 6, 1 / 7, z I]], {z, -3 / 4, 3 / 4}]绘制 AppellF2 函数族:
Plot[Table[Abs[AppellF2[1 / 2, 1 / 3, 1 / 4, 1 / 5, 1 / 6, n / 10 I, z I]], {n, -5, 5, 1}]//Evaluate, {z, -3 / 4, 3 / 4}]Series[AppellF2[1, 1, 1, 1, 3, 4, x], {x, 0, 3}]TraditionalForm 格式:
AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], x, y]//TraditionalForm范围 (17)
数值运算 (6)
AppellF2[3, 2, 1, 2, 3, 1 / 3, 0.2]AppellF2[-2, -1, -2, 5, 2 / 3 + I, 0.4, 0.3]N[AppellF2[3, 2, 1, 2, 3, 1 / 3, 2 / 5], 10]AppellF2[3, 2, 1, 2, 3, 1 / 3, 0.400000000000000000001]AppellF2[I, 1, 1 + I, 3.2, 1 / 2, 0.5, 0.2 + 0.5 I]以高精度高效地运算 AppellF2:
AppellF2[3, 2, 1, 2, 1 / 3, 1 / 7, 1 / 5`100]//TimingAppellF2[3, 2, 1, 2, 7, 1 / 3, -1 / 5`100 + I];//Timing用 Around 计算一般情况下的统计区间:
AppellF2[ 1 / 2, 1, 5 / 2, 3, 1, 0, Around[2.1, 0.01]]AppellF2[1 / 2, 1, 1 / 2, 1 / 2, 1, 0, {{1 / 2, 2}, {2, 1 / 2}}]或用 MatrixFunction 计算矩阵形式的 AppellF2 函数:
MatrixFunction[AppellF2[1 / 2, 1, 1 / 2, 1 / 2, 1, 0, #]&, {{1 / 2, 2}, {2, 1 / 2}}]//FullSimplify特定值 (3)
AppellF2[1 / 2, 0, 1 / 2, 1, 1 / 2, 0, 2]AppellF2[1 / 2, 1 / 3, 1 / 4, 1 / 5, 1 / 2, 0, 2]简化为 Hypergeometric2F1 函数:
AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], x, 0]AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], 0, y]AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], 0, 0]可视化 (3)
绘制不同参数的 AppellF2 函数图形:
Plot[{AppellF2[2, 1, 3, 1 / 3, 2, x, 1 / 3], AppellF2[2, 1, 3, 1 / 3, 2, x, 1 / 4], AppellF2[2, 1, 3, 1 / 3, 2, x, 1 / 5]}, {x, -1 / 2, 1 / 2}]将 AppellF2 作为其第二个参数
的函数,绘制其图形:
Plot[{AppellF2[2, 1, 1 / 2, 1 / 3, 2, 1 / 3, y], AppellF2[2, 1, 1 / 2, 1 / 3, 2, 1 / 4, y], AppellF2[2, 1, 1 / 2, 1 / 3, 2, 1 / 5, y]}, {y, -1 / 2, 1 / 2}]ComplexContourPlot[Re[AppellF2[2, 1, 3, 1 / 3, 2, 0, z]], {z, -1 - I, 1 + I}]ComplexContourPlot[Im[AppellF2[2, 1, 3, 1 / 3, 2, 0, z]], {z, -5 - 5I, 5 + 5I}]求导 (4)
D[AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], x, y], x]D[AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], x, y], y]Table[D[AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], x, y], {y, k}], {k, 1, 3}]//FullSimplify当 a=b1=b2=2, c1=c2=5 且 x=1/5 时,绘制关于 y 的高阶导数:
Plot[Evaluate[% /. {a -> 2, Subscript[b, 1] -> 2, Subscript[b, 2] -> 2, Subscript[c, 1] -> 5, Subscript[c, 2] -> 5, x -> 1 / 5}], {y, -1 / 2, 1 / 2}, Rule[...]]D[AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], x, y], {y, n}]级数展开 (1)
使用 Series 求泰勒展开式:
Series[AppellF2[a, Subscript[b, 1], Subscript[b, 2], Subscript[c, 1], Subscript[c, 2], x, y], {x, 0, 2}]//Normal//FullSimplifyterms = Normal@Table[Series[AppellF2[1 / 2, 1 / 3, 1 / 4, 1 / 5, 1 / 6, x, .3], {x, 0, m}], {m, 1, 5, 2}];
Plot[{AppellF2[1 / 2, 1 / 3, 1 / 4, 1 / 5, 1 / 6, x, .3], terms}, {x, 0, 1 / 2}]应用 (1)
pde = {x (1 - x) f^(2, 0)[x, y] - x y f^(1, 1)[x, y] + (Subscript[c, 1] - (a + Subscript[b, 1] + 1)x)f^(1, 0)[x, y] - Subscript[b, 1] y f^(0, 1)[x, y] - a Subscript[b, 1] f[x, y] == 0, y (1 - y) f^(0, 2)[x, y] - x y f^(1, 1)[x, y] + (Subscript[c, 2] - (a + Subscript[b, 2] + 1)y)f^(0, 1)[x, y] - Subscript[b, 2] x f^(1, 0)[x, y] - a Subscript[b, 2] f[x, y] == 0};(pde /. {a -> 2, Subscript[b, 1] -> 1, Subscript[b, 2] -> 1 / 2, Subscript[c, 1] -> 1 / 3, Subscript[c, 2] -> 2}) /. f -> Function[{x, y}, AppellF2[2, 1, 1 / 2, 1 / 3, 2, x, y]];% /. Thread[{x, y} -> RandomReal[{-3 / 4, 3 / 4}, {2}, WorkingPrecision -> 20]]巧妙范例 (1)
许多初等函数和特殊函数是 AppellF2 的特例:
funclist = Inactivate[...];Grid[...]//TraditionalForm相关指南
-
▪
- 超几何函数
相关链接
文本
Wolfram Research (2023),AppellF2,Wolfram 语言函数,https://reference.wolfram.com/language/ref/AppellF2.html.
CMS
Wolfram 语言. 2023. "AppellF2." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/AppellF2.html.
APA
Wolfram 语言. (2023). AppellF2. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/AppellF2.html 年
BibTeX
@misc{reference.wolfram_2026_appellf2, author="Wolfram Research", title="{AppellF2}", year="2023", howpublished="\url{https://reference.wolfram.com/language/ref/AppellF2.html}", note=[Accessed: 14-August-2026]}
BibLaTeX
@online{reference.wolfram_2026_appellf2, organization={Wolfram Research}, title={AppellF2}, year={2023}, url={https://reference.wolfram.com/language/ref/AppellF2.html}, note=[Accessed: 14-August-2026]}
