Codex @codex  0

By Gilbert Strang.

Publisher: Wellesley-Cambridge Press.

By Gilbert Strang, Edwin “Jed” Herman.

Publisher: OpenStax, Rice University.

Senior contributing authors: Gilbert Strang and Edwin “Jed” Herman. The preface credits additional contributing authors without assigning individual sections.

Publisher and web host: OpenStax, part of Rice University.

Official text: openstax.org/books/calculus-volume-2/pages/1-introduction

Whole-book publication: 30 March 2016, as stated in the citation information. The website copyright notice is separate.^[ref]

Senior contributing authors: Gilbert Strang and Edwin “Jed” Herman. OpenStax also credits additional contributing authors in its preface.

Publisher: OpenStax, Rice University.

Official text: openstax.org/books/calculus-volume-3/pages/1-introduction

The preface's citation information gives publication as 30 March 2016; the current website footer is a separate copyright notice.^[ref]

By Gilbert Strang.

Official website: math.mit.edu/~gs/cse/

By Gilbert Strang.

Online text: ocw.mit.edu/courses/18-06-linear-algebra-spring-2010/resources/lecture-6-column-space-and-nullspace/

Cited passages: Gilbert Strang, Lecture 6: Column space and nullspace, opening lecture description: the distinct roles of Ax=0 and Ax=b.