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  2. Matrix (chemical analysis) - Wikipedia

    en.wikipedia.org/wiki/Matrix_(chemical_analysis)

    In cases with complex or unknown matrices, the standard addition method can be used. [3] In this technique, the response of the sample is measured and recorded, for example, using an electrode selective for the analyte. Then, a small volume of standard solution is added and the response is measured again. Ideally, the standard addition should ...

  3. Group representation - Wikipedia

    en.wikipedia.org/wiki/Group_representation

    Finite groups — Group representations are a very important tool in the study of finite groups. They also arise in the applications of finite group theory to crystallography and to geometry. If the field of scalars of the vector space has characteristic p , and if p divides the order of the group, then this is called modular representation ...

  4. Matrix isolation - Wikipedia

    en.wikipedia.org/wiki/Matrix_isolation

    Matrix isolation is an experimental technique used in chemistry and physics. It generally involves a material being trapped within an unreactive matrix. A host matrix is a continuous solid phase in which guest particles (atoms, molecules, ions, etc.) are embedded. The guest is said to be isolated within the host matrix.

  5. Representation theory - Wikipedia

    en.wikipedia.org/wiki/Representation_theory

    Let be a vector space over a field. [6] For instance, suppose is or , the standard n-dimensional space of column vectors over the real or complex numbers, respectively.In this case, the idea of representation theory is to do abstract algebra concretely by using matrices of real or complex numbers.

  6. List of named matrices - Wikipedia

    en.wikipedia.org/wiki/List_of_named_matrices

    Several important classes of matrices are subsets of each other. This article lists some important classes of matrices used in mathematics, science and engineering. A matrix (plural matrices, or less commonly matrixes) is a rectangular array of numbers called entries. Matrices have a long history of both study and application, leading to ...

  7. Matrix (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Matrix_(mathematics)

    Chemistry makes use of matrices in various ways, particularly since the use of quantum theory to discuss molecular bonding and spectroscopy. Examples are the overlap matrix and the Fock matrix used in solving the Roothaan equations to obtain the molecular orbitals of the Hartree–Fock method .

  8. Representation theory of finite groups - Wikipedia

    en.wikipedia.org/wiki/Representation_theory_of...

    Thus, without loss of generality, we can study vector spaces over . Representation theory is used in many parts of mathematics, as well as in quantum chemistry and physics. Among other things it is used in algebra to examine the structure of groups. There are also applications in harmonic analysis and number theory. For example, representation ...

  9. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Algebraic geometry, the study of curves, surfaces, and their generalizations, which are defined using polynomials. Topology, the study of properties that are kept under continuous deformations. Algebraic topology, the use in topology of algebraic methods, mainly homological algebra. Discrete geometry, the study of finite configurations in geometry.