* Checks document order of two siblings * @param {Element} a * @param {Element} b * @returns {Number} Returns less than 0 if a precedes b, greater

* Checks document order of two siblings * @param {Element} a * @param {Element} b * @returns {Number} Returns less than 0 if a precedes b, greater

* Checks document order of two siblings * @param {Element} a * @param {Element} b * @returns {Number} Returns less than 0 if a precedes b, greater

* Checks document order of two siblings * @param {Element} a * @param {Element} b * @returns {Number} Returns less than 0 if a precedes b, greater

* Checks document order of two siblings * @param {Element} a * @param {Element} b * @returns {Number} Returns less than 0 if a precedes b, greater

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Used to numerically calculate the inner product coeffientes of SOAP with polynomial radial basis.

Transforms a set of chemical symbols into the corresponding atomic numbers. Args: symbols(iterable): List of chemical symbols. R

Used to check the validity of given G2 parameters. Args: value(n*3 array): List of G2 parameters.

Used to check the validity of given G3 parameters and to initialize the C-memory layout for them. Args: value(array): Lis

Used to check the validity of given G4 parameters and to initialize the C-memory layout for them. Args: value(n*3 array):

Used to check the validity of given G5 parameters and to initialize the C-memory layout for them. Args: value(n*3 array):

Used to check the validity of given radial cutoff. Args: value(float): Radial cutoff.

Returns a function that can be used to create a valid ValleOganov descriptor for a dataset.