Texts on the front cover, and Back-Cover Texts on the back cover. Both covers must also clearly
and legibly identify you as the publisher of these copies. The front cover must present the full
title with all words of the title equally prominent and visible. You may add other material on the
covers in addition. Copying with changes limited to the covers, as long as they preserve the title of
the Document and satisfy these conditions, can be treated as verbatim copying in other respects.
If the required texts for either cover are too voluminous to fit legibly, you should put the first ones
listed (as many as fit reasonably) on the actual cover, and continue the rest onto adjacent pages.
If you publish or distribute Opaque copies of the Document numbering more than 100, you must
either include a machine-readable Transparent copy along with each Opaque copy, or state in
or with each Opaque copy a computer-network location from which the general network-using
public has access to download using public-standard network protocols a complete Transparent
copy of the Document, free of added material. If you use the latter option, you must take reason-
ably prudent steps, when you begin distribution of Opaque copies in quantity, to ensure that this
Transparent copy will remain thus accessible at the stated location until at least one year after
the last time you distribute an Opaque copy (directly or through your agents or retailers) of that
edition to the public.
It is requested, but not required, that you contact the authors of the Document well before re-
distributing any large number of copies, to give them a chance to provide you with an updated
version of the Document.
4. MODIFICATIONS
You may copy and distribute a Modified Version of the Document under the conditions of sections
2 and 3 above, provided that you release the Modified Version under precisely this License, with
the Modified Version filling the role of the Document, thus licensing distribution and modification
of the Modified Version to whoever possesses a copy of it. In addition, you must do these things in
the Modified Version:
A. Use in the Title Page (and on the covers, if any) a title distinct from that of the Document, and
from those of previous versions (which should, if there were any, be listed in the History section of
the Document). You may use the same title as a previous version if the original publisher of that
version gives permission. B. List on the Title Page, as authors, one or more persons or entities
responsible for authorship of the modifications in the Modified Version, together with at least
five of the principal authors of the Document (all of its principal authors, if it has fewer than
five), unless they release you from this requirement. C. State on the Title page the name of the
publisher of the Modified Version, as the publisher. D. Preserve all the copyright notices of the
Document. E. Add an appropriate copyright notice for your modifications adjacent to the other
copyright notices. F. Include, immediately after the copyright notices, a license notice giving the
public permission to use the Modified Version under the terms of this License, in the form shown
in the Addendum below. G. Preserve in that license notice the full lists of Invariant Sections and
required Cover Texts given in the Document’s license notice. H. Include an unaltered copy of this
License. I. Preserve the section Entitled ”History”, Preserve its Title, and add to it an item stating
at least the title, year, new authors, and publisher of the Modified Version as given on the Title
Page. If there is no section Entitled ”History” in the Document, create one stating the title, year,
authors, and publisher of the Document as given on its Title Page, then add an item describing
the Modified Version as stated in the previous sentence. J. Preserve the network location, if any,
given in the Document for public access to a Transparent copy of the Document, and likewise the
Victor Eijkhout – T
E
X by Topic 17