Deletion of Elementary Calculus: An Infinitesimal Approach

Comment: I don't quite see how the book fails  #1 and #4. Moreover one has to consider that the formulation of that guideline primarily targets fiction and popular literature, so applying it strictly to the letter in #1 by arguing this math book was not discussed in general interest publications seems a bit nonsensical to me. In any case #4 holds as far as I can tell, i.e. there are/have been university courses being taught based on that book
Stance: keep
Cited policy: Wikipedia:Notability (WP:NB)

Comment: sufficient attention by journals within the field, which are considered , to meet the requirements of the |general notability guideline. The "coverage outside of mathematics" approach has no basis in Wikipedia policy or guidelines. It is not a generally accepted practice to find new and exciting reasons to delete articles
Stance: keep
Cited policy: Wikipedia:Reliable sources (WP:RS||WP:GNG)