# Template:BookReference

This template is to be used to provide a reference to an entry in the Books page.

This page documents how to use this template, both technically and stylistically.

## Basic Functionality

In its most basic form, the template may be used as follows:

• {{BookReference|Name of book|Year/Date of publication|Author}}
• {{BookReference|Name of book|Year/Date of publication|Author 1|author2 = Author 2}}
• {{BookReference|Name of book|Year/Date of publication|Author 1|author2 = Author 2|author3 = Author 3}}
• {{BookReference|Name of book|Year/Date of publication|Author 1|author2 = Author 2|author3 = Author 3|author4 = Author 4}}
• {{BookReference|Name of book|Year/Date of publication|Author 1|author2 = Author 2|author3 = Author 3|author4 = Author 4|author5 = Author 5}}
• {{BookReference|Name of book|Year/Date of publication|Author 1|author2 = Author 2|author3 = Author 3|author4 = Author 4|author5 = Author 5|author6 = Author 6}}

where each of the Author fields is to be filled with the author name, as specified in the work under consideration.

(NOTE: It does not matter whether or not an author is already named differently on Mathematicians; see "Possible Issues" below.)

## How to Use

This template is invoked almost exclusively in the Sources section. A representative instance, taken from Definition:Set Union, is:

* {{BookReference|Naive Set Theory|1960|Paul R. Halmos|prev = Union of Singleton|next = Union with Empty Set}}: $\S 4$: Unions and Intersections

Thus, in steps:

• Precede the template with an asterisk, *, and a space
• Use prev and next fields, if desired (see "Features" below)
• A colon, :, and a space
• The section of the book the reference applies to (optionally with section name, if applicable)
• The number of the definition/theorem, if applicable

## Features

To document and emulate the linear flow of reading that characterizes a book, the entries prev and next are used, as in:

{{BookReference|Introduction to Abstract Algebra|1969|C.R.J. Clapham|prev = Characteristic of Subfield of Complex Numbers is Zero|next = Characteristic of Finite Ring is Non-Zero}}

which is used on Characteristic times Ring Element is Ring Zero and renders as:

As the names suggest, the following are the intended values for prev and next:

• The prev field holds the title of the Template:ProofWiki page that is concerned with the information preceding the particular entry in the source work.
• The next field holds the title of the Template:ProofWiki page that is concerned with the information following the particular entry in the source work.

Thus:

prev = Characteristic of Subfield of Complex Numbers is Zero

above indicates that in Template:BookLink, the result Characteristic of Subfield of Complex Numbers is Zero is followed by the result Characteristic times Ring Element is Ring Zero.

Similarly, the part:

next = Characteristic of Finite Ring is Non-Zero

indicates that in said source, Characteristic times Ring Element is Ring Zero is followed by Characteristic of Finite Ring is Non-Zero.

As usual, these options have to be separated from the others by using the pipe character |.

## Possible Issues

Of course, before resorting to the solutions provided below, please verify that no spelling errors have been made while trying to invoke the template.

### One or more of the authors turns up in red

If the name of one or more of the authors shows in red, this means said author does not have a page on Mathematician:Mathematicians under the name that appears on the book.

It could happen that this author does actually have a page under another name (usually by juggled initials and/or first names).

In this simple case, all that needs to be done is to create a redirect from the non-existent rendering of the name to the one that actually is already covered.

Should the author be completely absent from Template:ProofWiki as of yet, then please create a page according to Help:Editing/Creating Pages for Mathematicians contact one of the administrators.