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  2. Fundamental frequency - Wikipedia

    en.wikipedia.org/wiki/Fundamental_frequency

    The fundamental frequency, often referred to simply as the fundamental, is defined as the lowest frequency of a periodic waveform. In music, the fundamental is the musical pitch of a note that is perceived as the lowest partial present. In terms of a superposition of sinusoids, the fundamental frequency is the lowest frequency sinusoidal in the ...

  3. Eigenvalues and eigenvectors - Wikipedia

    en.wikipedia.org/wiki/Eigenvalues_and_eigenvectors

    1) then v is an eigenvector of the linear transformation A and the scale factor λ is the eigenvalue corresponding to that eigenvector. Equation (1) is the eigenvalue equation for the matrix A . Equation (1) can be stated equivalently as (A − λ I) v = 0 , {\displaystyle \left(A-\lambda I\right)\mathbf {v} =\mathbf {0} ,} (2) where I is the n by n identity matrix and 0 is the zero vector ...

  4. GCFLearnFree.org - Wikipedia

    en.wikipedia.org/wiki/GCFLearnFree.org

    GCFLearnFree. edu.GCFGlobal.org (formerly GCFLearnFree.org) is a free online educational website focusing on technology, job training, reading, and math skills. The site is a program of the Goodwill Community Foundation Inc. (GCF). All content in English is created in Raleigh, North Carolina and all the content in Spanish Bogotá, Colombia ...

  5. TI-86 - Wikipedia

    en.wikipedia.org/wiki/TI-86

    4 AAA 's, 1 CR1616 or CR1620. The TI-86 is a programmable graphing calculator introduced in 1996 which was produced by Texas Instruments. The TI-86 uses the Zilog Z80 microprocessor. It is partially backwards-compatible with its predecessor, the TI-85 . In addition to having a larger screen than the TI-83, the TI-86 also allows the user to type ...

  6. Drake equation - Wikipedia

    en.wikipedia.org/wiki/Drake_equation

    Each original site expands with an expansion velocity v, and establishes additional sites that survive for a lifetime L. The result is a more complex set of 3 equations. Reappearance factor The Drake equation may furthermore be multiplied by how many times an intelligent civilization may occur on planets where it has happened once.

  7. Indian rupee - Wikipedia

    en.wikipedia.org/wiki/Indian_Rupee

    The Indian rupee ( symbol: ₹; code: INR) is the official currency in India. The rupee is subdivided into 100 paise ( Hindi plural; singular: paisa ). The issuance of the currency is controlled by the Reserve Bank of India.

  8. Modular multiplicative inverse - Wikipedia

    en.wikipedia.org/wiki/Modular_multiplicative_inverse

    Modular multiplicative inverse. In mathematics, particularly in the area of arithmetic, a modular multiplicative inverse of an integer a is an integer x such that the product ax is congruent to 1 with respect to the modulus m. [1] In the standard notation of modular arithmetic this congruence is written as.

  9. Gene density - Wikipedia

    en.wikipedia.org/wiki/Gene_density

    Gene density. In genetics, the gene density of an organism's genome is the ratio of the number of genes per number of base pairs, usually written in terms of a million base pairs, or megabase (Mb). The human genome has a gene density of 11-15 genes/Mb, while the genome of the C. elegans roundworm is estimated to have 200.