Sequences

Some articles on sequence, sequences:

Sequence (music) - Examples
... A well-known popular example of a threefold descending diatonic sequence is found in the refrain from the Christmas carol "Angels We Have Heard on High," as illustrated ... the circle of fifths Play The following three-fold ascending chromatic (non-diatonic) sequence occurs in the duet of Abubeker and Fatima from Act III of César Cui's opera Prisoner of the ... lines reiterate a florid two-beat melodic motif for three and a half bars in a series of melodic sequences on the word "born." More subtle, though still present, are the underlying harmonic sequences ...
HMMER
... HMMER is a free and commonly used software package for sequence analysis written by Sean Eddy ... Its general usage is to identify homologous protein or nucleotide sequences ... this by comparing a profile-HMM to either a single sequence or a database of sequences ...
Dyson's Transform
... Let A be a sequence of natural numbers, and x be any real number ... Suppose and are two sequences of natural numbers ... For any element e in A, Dyson's transform consists in forming the sequences and ...
Direct Repeat
... Direct repeats are a type of genetic sequence that consists of two or more repeats of a specific sequence ... Direct repeats are nucleotide sequences present in multiple copies in the genome ... There are several types of repeated sequences ...
Spectral Sequences
... In homological algebra and algebraic topology, a spectral sequence is a means of computing homology groups by taking successive approximations ... Spectral sequences are a generalization of exact sequences, and since their introduction by Jean Leray (1946), they have become an important research tool ...