Generally, as errors are discovered, they are fixed, and the texts are re-uploaded. In practice, you should look at the most recent versions of the textbook, which is linked to the homepage. The files linked here are an archive of previously uploaded versions. 
  
    | Date compiled | Link | Notes / changes | 
  
    | 2 Sept 2025 | file | Year in title changed; public repo linked. Backend edits (macros consolidated). | 
  
    | 1 Sept 2025 | text_differential_calculus_2025_09_01.pdf | Updates for AY 2025 | 
  
    | 10 Dec 2024 | text_differential_calculus_2024_12_10.pdf | Fixed typo (alway -> always); added page numbers to flavoured chapters | 
  
    | 12 Nov 2024 | text_differential_calculus_2024_11_12.pdf | Updated learning objectives for 13.2 | 
  
    | 7 Nov 2024 | text_differential_calculus_2024_11_07.pdf | Updated learning objectives for linear DEs and 3D graphing | 
  
    | 2 Nov 2024 | text_differential_calculus_2024_11_02.pdf | Added list of Maclaurin polynomials, Theorem 9.5.7 | 
  
    | 31 Oct 2024 | text_differential_calculus_2024_10_31.pdf | p 209, equation after the sentence "Hence" near the top of the page, was missing a 2 in the denominator. | 
  
    | 30 Oct 2024 | text_differential_calculus_2024_10_30.pdf | Updated handling of footnotes inside flavoured section; added MVT in optional section; added clarification about assessable content regarding error formula for Taylor approximations | 
  
    | 28 Oct 2024 | text_differential_calculus_2024_10_28.pdf | Def 7.2.1 (critical point) said f(a)=0 instead of f'(a)=0 | 
  
    | 24 Oct 2024 | text_differential_calculus_2024_10_24.pdf | Added warning to p35 about properly explaining the behaviour when evaluating a limit. | 
  
    | 21 Oct 2024 | text_differential_calculus_2024_10_21.pdf | Added note to the first definition of local min (on page 10) pointing to the later, more thorough definition. | 
  
    | 17 Oct 2024 | text_differential_calculus_2024_10_17.pdf | Consolidated (and lightly edited) definitions of critical point, singular point, and inflection point. | 
  
    | 15 Oct 2024 | text_differential_calculus_2024_10_15.pdf | Minor wording changes to learning objectives in the sketching section | 
  
    | 11 Oct 2024 | text_differential_calculus_2024_10_11.pdf | Updates to sketching section: learning objectives, definition of inflection point, finding sign changes in factored functions, and order of topics (sketching before optimization) | 
  
    | 26 Sept 2024 | text_differential_calculus_2024_09_26_second.pdf | Added Learning Objective to Section 4.2, Trigonometric functions and their derivatives | 
  
    | 26 Sept 2024 | text_differential_calculus_2024_09_26.pdf | Added Learning Objective to Section 4.6, Inverse Functions | 
  
    | 16 Sept 2024 | text_differential_calculus_2024_09_16.pdf | Squeeze theorem context added; Thm 2.3.6 wording altered to specify interior of domain | 
  
    | 9 Sept 2024 | text_differential_calculus_2024_09_09.pdf | Discussion of assessable material added to Ch0 | 
  
    | 8 Sept 2024 | text_differential_calculus_2024_09_08.pdf | 'h' changed to 'x' p59 | 
  
    | 7 Sept 2024 | text_differential_calculus_2024_09_07.pdf | Added cover art | 
  
    | 6 Sept 2024 | text_differential_calculus_2024_09_06.pdf | Formatting p64 | 
    | 3 Sept 2024 | text_differential_calculus_2024_09_03.pdf | Updated definition of power function; minor formatting | 
  
    | 27 Aug 2024 | text_differential_calculus_2024_08_27.pdf | Initial version |