The theory of orthogonal polynomials has matriarchal experienced an important development in recent decades. The first contact of our research group the question arose dearrollar to a method of Frobenius matriarchal matriarchal to solve differential equations second order without increasing the size of the problem. Of This appeared polynomial type solutions matriarchal matriarchal differential equations that widespread classical Hermite scalar equations, Laguerre; Legendre.En the PhD thesis of R. Company [3] and in the following [34], [35], [40], were introduced matriarchal Laguerre polynomials, Hermite and Gegenbauer, to verify certain properties of orthogonality nature not entirely transparent. We are then, having examples of classes specific orthogonal polynomials, the notion of unstructured orthogonality, although it had been published, including in an abstract, but next, results orthogonality of polynomials in a non-commutative algebra [10], [11]. The objective of this thesis is bidirectional: on the one hand it is well structured for the idea of orthogonality polynomials matriarchal, but with the intention to achieve the utility in applications that provide the families of classical orthogonal polynomials scalars. We thinking in the short term, in this work, using the idea of matriarchal ortoganalidad of polynomials to approximate matriarchal integrals, and also to develop fundiones in matriarchal matriarchal series of orthogonal polynomials. These ambitions have been influenced by the approach of Chiha [5] and the work of Stone [70] and Ghizzetti [29]. in memory solved some of the difficulties that appear and some answers are sumnistran, partially published in [36], [38], [39], [41], which are far from the final of the many goals in this line, we are can achieve. Among the questions to be solved subject to this work are: - Definition of orthogonality for polynomials matrilineal and matriarchal duties. - Structuring a regulated basis, where lie the orthogonal functions matriarchal. - Study the relationship of the rule base and the space concept of orthogonality in the absence of Hilbert space. - Solving the problem of best approximation matriarchal respect to a positive functional defined matriarchal. - Fourier Series matriarchal. - Collection of analogues of Riemann-Lebesgue Lemma and equality (inequality) Bessel-Parseval, in the absence of hilbertiana structure. - Introduction of the concept of totality for a family of orthogonal functions in the absence of matriarchal structure hilbertiana. - Possible development in series of orthogonal polynomials matrilineal (only for the case of Hermite) - Application development of the exponential of a matrix. The theory of orthogonal polynomials has matriarchal experienced an important development in recent decades. The first contact of our research group the question arose dearrollar to a method of Frobenius matriarchal matriarchal to solve differential equations second order without increasing the size of the problem. Of This appeared polynomial type solutions matriarchal matriarchal differential equations that widespread classical Hermite scalar equations, Laguerre; Legendre.En the PhD thesis of R. Company [3] and in the following [34], [35], [40], were introduced matriarchal Laguerre polynomials, Hermite and Gegenbauer, to verify certain properties of orthogonality nature not entirely transparent. We are then, having examples of classes specific orthogonal polynomials, the notion of unstructured orthogonality, although it had been published, including in an abstract, but next, results orthogonality of polynomials in a non-commutative algebra [10], [11]. The objective of this thesis is bidirectional: on the one hand it is well structured for the idea of orthogonality polynomials matriarchal, but with the intention to achieve the utility in applications that provide the families of classical orthogonal polynomials scalars. We thinking in the short term, in this work, using the idea of matriarchal ortoganalidad of polynomials to approximate matriarchal integrals, and also to develop fundiones in matriarchal matriarchal series of orthogonal polynomials. These ambitions have been influenced by the approach of Chiha [5] and the work of Stone [70] and Ghizzetti [29]. in memory solved some of the difficulties that appear and some answers are sumnistran, partially published in [36], [38], [39], [41], which are far from the final of the many goals in this line, we are can achieve. Among the questions to be solved subject to this work are: - Definition of orthogonality for polynomials matrilineal and matriarchal duties. - Structuring a regulated basis, where lie the orthogonal functions matriarchal. - Study the relationship of the rule base and the space concept of orthogonality in the absence of Hilbert space. - Solving the problem of best approximation matriarchal respect to a positive functional defined matriarchal. - Fourier Series matriarchal. - Collection of analogues of Riemann-Lebesgue Lemma and equality (inequality) Bessel-Parseval, in the absence of hilbertiana structure. - Introduction of the concept of totality for a family of orthogonal functions in the absence of matriarchal structure hilbertiana. - Possible development in series of orthogonal polynomials matrilineal (only for the case of Hermite) - Application development of the exponential of a matrix.