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transcripcion.tex
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\documentclass[a4paper]{article} | |
\usepackage[english]{babel} | |
\usepackage[utf8x]{inputenc} | |
\usepackage{amsmath} | |
\usepackage{amssymb} | |
\usepackage{amsthm} | |
\newtheorem{teo}{Teorema}[section] | |
\begin{document} | |
% \section{}, sec [tab] | |
% math italics: $x$ | |
% formula centrada: \begin{equation} \label{xxx} º\end{equation} | |
\section{Operadores Diferenciales Actuando sobre Funciones Monogénicas Generalizadas que Satisfacen Ecuaciones Diferenciales con Lados Derechos Anti-Monogénicos} | |
Se introduce el operador diferencial $l$, | |
\begin{equation} | |
\label{eleu} | |
lu := Du - F(x, u), | |
\end{equation} | |
$u \in C^1(\Omega, A)$ y $F(x, u)$ es una funcion antimonogenica de la forma (2.2). | |
Considerando el Operador diferencial $L$, | |
\begin{eqnarray} | |
\label{elegrandeu} | |
Lu(t, x) &:=& \sum_{A,B,i} c_{B,i}^{(A)}(t,x) \partial_{x_i} u_B (t,x) e_A \\ | |
&+& \sum_{A,B} d_B^{(A)}(t,x)u_B(t,x)e_A | |
+ \sum_{A}g_A(t,x)e_A, | |
\end{eqnarray} | |
actuando sobre el espacio de funciones definido como el kernel del operador diferencial $l$ definido por (3.1). Asume que los coeficientes del operador $L$ son valores reales y continuamente diferenciables con respecto a $x$ y dependen continuamente de $t$. Asume, además, que los coeficientes del operador $l$ son independientes de $t$ y continuamnete diferenciables con respecto a $x$. | |
Ahora determinamos las condiciones suficientes para los coeficientes de $L$ bajo los cuales $L$ es asociado a $l$. Suponga que $u$ es una solución a una ecuación diferencial | |
\begin{equation} | |
\label{luigual0} | |
lu = 0. | |
\end{equation} | |
Entonces las derivadas de los componentes $u_A$ con respecto a $x_0$ pueden ser representadas por (2.8). Sea | |
\begin{equation} | |
\label{lsub0u} | |
L_{0u} := L_u - G(t, x). | |
\end{equation} | |
Entonces en vista de (3.1) tenemos | |
\begin{eqnarray} | |
l(Lu) &=& D(Lu) - F(x, Lu) | |
\\ &=& D(L_{0u} + G) - F(x, Lu) | |
\\ &=& D(L_{0u}) + D(G) - F(x, Lu) | |
\end{eqnarray} | |
Se introducen las funciones | |
\begin{eqnarray} | |
% primera linea | |
\Gamma_1^{(\alpha)} (\beta, \mu, \gamma) &=& c_{\beta,\mu}^{(\alpha)} | |
- \sum_{\gamma}{ | |
k_{\mu\beta\gamma} | |
c_{\gamma,0}^{(\alpha)} | |
}\\ | |
% end primera linea | |
% segunda linea | |
\Gamma_2^{(\alpha)} (\beta, \gamma) &=& \sum_{\beta} { | |
f_{\gamma \beta} c_{\beta,0}^{(\alpha)} | |
+ d_{\gamma}^{(\alpha)} | |
}\\ | |
% end segunda linea | |
% tercera linea | |
\Gamma_3^{(\alpha)}(\beta, x_m, \gamma) &=& \sum_{\beta} { | |
\partial_{x_m} | |
\big( | |
f_{\gamma \beta} c_{\beta,0}^{(\alpha)} | |
\big) | |
+ \partial_{x_m}d_{\gamma}^{(\alpha)} | |
} | |
% end tercera linea | |
\end{eqnarray} | |
dependiendo del los coeficientes de los operadores $L$ y $l$ y las constantes $k_{\mu \beta \gamma}$ definidas por (2.4), donde $\alpha, \beta, \gamma \in S$ y $u = 1, ..., n$. | |
% check this too | |
"En la secuela ? // continuando ?? " calcularemos las expresiones $D(L_{0u})$, $D(G)$ y $F(x, Lu)$ en (3.4). Reemplazando (2.8) en $L_{0u}$ y reordenando se obtiene | |
\begin{equation} | |
L_{0u} = \sum_{A,D} \big\{ | |
\sum_{j=1}^n | |
\Gamma_{1}^{(A)} (D, j, B) \partial_{xj}u_D | |
+ \Gamma_{2}^{(A)} (B, D)u_D | |
\big\}e_A | |
\end{equation} | |
Aplicando $D$ en ambos lados de (3.5), usando (2.8) y (2.4) en la expresion resultante y reordenando da | |
\begin{eqnarray} | |
D(L_0u) \\ | |
&=& \sum_{A,F}{ | |
\sum_{i,j=1}^n \big\{ | |
\sum_E k_{iEA} \Gamma_{1}^{(E)}(F, j, B) | |
- \sum_{D} k_{iFD} \Gamma_{1}^{(A)}(D, j, B) | |
\big\} \partial_{x_i} \partial_{x_j} u_F e_A | |
} \\ | |
&+& \sum_{A,D} | |
\sum_{j=1}^{n} \big\{ | |
\partial_{x_0} \Gamma_{1}^{(A)} (D, j, B) \\ | |
&+& \sum_E \big[ | |
\sum_{m=1}^{n} k_{m E A} \partial_{x_m} \Gamma_{1}^{(E)} (D, j, B) | |
+ f_{DE}\Gamma_{1}^{(A)} (E, j, B) \\ | |
&+& k_{jEA} \Gamma_{2}^{(E)} (B, D) | |
- k_{jDE} \Gamma_{2}^{(A)} (B,E) | |
\big] | |
\big\} \partial_{x_j} u_D e_A \\ | |
&+& \sum_{A,D} \big\{ | |
\Gamma_{3}^{(A)}(B, x_0, D) + \sum_E \big[ | |
f_{DE} \Gamma_{2}^{(A)} (B, E) \\ | |
&+& \sum_{m = 1} \big( | |
k_{mEA}\Gamma_{3}^{(E)} (B, x_m, D) | |
+ \Gamma_{1}^{(A)}(E, m, B) \partial_{x_m}f_{DE} | |
\big) | |
\big] | |
\big\} u_D e_A | |
\end{eqnarray} | |
Es facil mostrar que | |
\begin{equation} | |
D(G) = \sum_{A} | |
\big( | |
\partial_{x_0 g_A} + \sum_E \sum_{m=1}^n k_{mEA} \partial_{x_m} g_E | |
\big) | |
\end{equation} | |
Usando (3.5), (3.2) puede ser reescrita como | |
\begin{equation} | |
Lu = \sum_{A} (Lu)_{A} e_A | |
\end{equation} | |
Donde | |
\begin{equation} | |
(Lu)_A = \sum_D { | |
\big[ | |
\sum_{j=1}^n { | |
\Gamma_{1}^{(A)} (D, j, H) \partial_{x_j} u_D | |
+ \Gamma_{2}^{(A)} (L, D) u_D | |
} | |
\big] + g_A | |
} | |
\end{equation} | |
Entonces | |
\begin{eqnarray} | |
F(x, Lu) &=& \sum_A { | |
F_A(x) (Lu)_A (t,x) | |
} \\ | |
&=& \sum_A { | |
\big( | |
\sum_B { | |
f_{AB}(x) e_B | |
} | |
\big) (Lu)_A(t,x) | |
} | |
\end{eqnarray} | |
e intercamvbiando A y B en la ultima sumatoria obtenemos | |
\begin{equation} | |
F(x, Lu) = \sum_{A, B} f_{BA}(x) (Lu)_{B} (t,x) e_A. | |
\end{equation} | |
Sustituyendo (3.6), (3.7) y (3.9) en (3.4) y reacomodando da la siguiente combinación lineal de $\partial_{x_i} \partial_{x_j} u_F$, $\partial_{x_i} u_D$, $u_D$ y 1. | |
\begin{eqnarray} | |
l(Lu) &=& \sum_{A,F}{ | |
\sum_{i, j = 1}^n{ | |
X_{A,F,i,i} \partial_{x_i} \partial_{x_j} u_F e_A | |
} | |
} | |
+ \sum_{A, D} { | |
\sum_{j = 1}^n{ | |
Y_{A,D,j,} \partial_{x_i} u_D e_A | |
} | |
} \\ | |
&+& \sum_{A, D} { | |
Z_{A,D} u_D e_A | |
} | |
+ \sum_{A} { | |
W_A e_A | |
}, | |
\end{eqnarray} | |
Donde | |
\begin{eqnarray} | |
X_A,F,i,j &=& \sum_{E} { | |
k_{iEA} \Gamma_{1}^{(E)} (F,i,B) | |
} - \sum { | |
k_{iFD} \Gamma_{1}^{(A)} (D,j, B) | |
}, \\ | |
Y_{A,D,j} &=& \partial_{x_0} \Gamma_{1}^{(A)} (D, j B) \\ | |
&+& \sum_{E} { | |
\big\{ | |
\sum_{m=1}^n { | |
k_{mEA} \partial_{x_m} \Gamma_{1}^{(E)} (D, j B) | |
+ f_{DE} \Gamma_{1}^(A) (E, j, B) | |
} | |
} \\ | |
&-& f_{EA} \Gamma_{1}^{(E)}(D, j, B) | |
+ k_{jEA} \Gamma_{2}^{(E)} (B, D,) | |
- k_{jDE} \Gamma_{2}^{(A)} (B, E) | |
\big\}, \\ | |
Z_{A, D} &=& \sum_{3}^{(A)} (B, x_0, D) | |
+ \sum_{E} { | |
\big\{ | |
f_{DE} \Gamma_{2}^{(A)} (B, E) | |
- f_{EA} \Gamma_{2}^{(A)} (B, D) | |
} \\ | |
&+& \sum_{m=1}^{n} { | |
\big[ | |
k_{mEA} \Sigma_{3}^{(E)} (B,x_m, D) | |
+ \Sigma_{1}^(A) (E, m, B) \partial_{x_m} f_{DE} | |
\big] | |
\big\} | |
}, \\ | |
W_{A} &=& \partial_{x_0} g_A + \sum_{E} { | |
\big( | |
\sum_{m=1}^{n}{ | |
k_{mEA} \partial_{x_m} g_E | |
- f_{EA} g_E | |
} | |
\big) | |
} | |
\end{eqnarray} | |
\begin{teo} | |
$(L, l)$ forma un par asociado en el caso en que los coeficientes satisfagan los sistemas | |
\begin{eqnarray} | |
X_{A,F,i,j} &=& 0,\ para\ todo\ A, F \in S\ y\ todo\ i,j = 1,2,...,n\ con\ i \leq j, \\ | |
Y_{A,D,j} &=& 0,\ para\ todo\ A, D \in S\ y\ todo\ j = 1,2,...,n, \\ | |
Z_{A,D} &=& 0,\ para\ todo\ A, D \in S \\ | |
W_{A} &=& 0,\ para\ todo\ A \in S \\ | |
\end{eqnarray} | |
\end{teo} | |
Remark 3.2. Es facilmente visto que $lG = \sigma_A W_A e_A$. por consiguiente, la condicion (3.14) es necesaria y suficiente para que el coeficiente $G(t,x)$ sea solucion de la ecuacion (3.3). | |
\end{document} |
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