Bar 05 · Reference

About the editorial office

Delta Volume Docs is an independent academic reference prepared by a small editorial office. This page describes the method by which the material is gathered and checked, and the sense in which the reference is independent.

What the reference is

The reference is a body of expository writing on the mathematical theory of probability and statistics. It covers the axioms of probability, the classical families of distributions, the Gaussian normal law, matrices of covariance and correlation, stochastic series, stationarity and autocorrelation, spectral analysis, estimation and hypothesis testing. The treatment is theoretical throughout and is written for students and for readers who wish to recall the shape of an argument.

Editorial method

Each page is prepared in three passes. In the first, the object of study is fixed and its definition is stated plainly, with any necessary restriction made explicit. In the second, the properties that follow are derived in order, so that a reader can follow the reasoning without gaps. In the third, the wording is reviewed for clarity, and every formula is read against the surrounding prose to check that the two agree.

Notation is kept uniform across the reference. A capital letter denotes a random variable, a lowercase letter a realised number, μ a mean and σ a standard deviation. Matrices are written in bold with two indices per entry. Where a symbol has more than one common reading, the choice is stated on first use and held thereafter.

Figures

All figures are drawn by the editorial office itself. Some are vector drawings built directly into the pages; the remainder are photographs of public-domain scientific subjects used only as illustration. No figure is reproduced from a copyrighted source, and no figure is put to any purpose beyond study.

Independence

The reference is not affiliated with any standards body, institute or association. It accepts no sponsorship tied to the content of its pages, and it publishes no promotional material. Where a page refers to a named result, the name is used for recognition only and implies no endorsement in either direction.

What the office does not do

The office prepares and publishes explanatory prose. It distributes no files, offers no service, and provides no professional guidance of any kind. Enquiries that ask for advice on a specific matter fall outside its scope and will be answered only with a pointer to the general material.

Corrections

Readers who find an error are invited to write to the office through the contact page. A correction is reviewed by the same three passes as the original text and, when accepted, is folded into the page with the wording adjusted around it so that the surrounding argument remains whole. The date of the latest review is recorded on each page entry as the material is revised.

The contact page gives the postal address, the electronic mail address and the telephone number of the editorial office, together with a short form for comment.

Review cycle

Every page is read again at intervals, and a page that has changed is dated when it is reissued. A reader may therefore see when a passage was last looked at, and may judge how current the wording is. The cycle is deliberately slow: a frequent change of wording makes a reference harder to cite, and a stable text is worth more to a reader than a fresh one. Corrections are made sharp when the matter is a plain mistake, and gently when the matter is only one of style.