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MATH 235Linear Algebra 2 for Honours Mathematics

Units
0.50
Faculty
Mathematics
Subject
Mathematics

When it runs

  1. F24
  2. W25
  3. S25
  4. F25
  5. W26
  6. S26
  7. F26
  8. W27
  9. S27

Ran in 7 of the last 7 terms. Winter 2027: scheduled, 4 lecture sections. Spring 2027: schedule not out yet.

Orthogonal and unitary matrices and transformations. Orthogonal projections, Gram-Schmidt procedure, best approximations, least-squares. Inner products, angles and orthogonality, orthogonal diagonalization, singular value decomposition, applications.

Prerequisites

  • Complete all of the following
    • Complete 1 of the following
      • Must have completed the following:
        • MATH146 - Linear Algebra 1 (Advanced Level) (0.50)
      • Earned a minimum grade of 60% in each of the following:
        • MATH136 - Linear Algebra 1 for Honours Mathematics (0.50)
      • Earned a minimum grade of 70% in at least 1 of the following:
        • MATH106 - Applied Linear Algebra 1 (0.50)
        • MATH114 - Linear Algebra for Science (0.50)
        • MATH115 - Linear Algebra for Engineering (0.50)
    • Complete 1 of the following

Corequisites

  • Completed or concurrently enrolled in at least 1 of the following:
    • MATH128 - Calculus 2 for the Sciences (0.50)
    • MATH138 - Calculus 2 for Honours Mathematics (0.50)
    • MATH148 - Calculus 2 (Advanced Level) (0.50)

Antirequisites

  • Not completed nor concurrently enrolled in any of the following:
    • MATH225 - Applied Linear Algebra 2 (0.50)
    • MATH245 - Linear Algebra 2 (Advanced Level) (0.50)

Leads to

Fall 2026 sections

Enrolment from UW Open Data, which can trail Quest by up to two days. Instructors and rooms: Schedule of Classes.
SectionClassEnrolledMeets
LEC 0015943118 / 122MWF 11:30–12:20
LEC 0025944120 / 125MWF 12:30–13:20
LEC 0035945113 / 121MWF 12:30–13:20
LEC 0046033122 / 122MWF 10:30–11:20
LEC 0816592117 / 150Online or by arrangement
TUT 1015927247 / 250Th 17:30–18:20
Oct 15 17:30–18:20
Th 17:30–18:20
Th 17:30–18:20
TUT 1026568226 / 240Th 17:30–18:20
Oct 15 17:30–18:20
Th 17:30–18:20
Th 17:30–18:20
TST 2016713473 / 490Oct 19 19:00–20:50
Nov 16 19:00–20:50

Winter 2027 sections

Enrolment from UW Open Data, which can trail Quest by up to two days. Instructors and rooms: Schedule of Classes.
SectionClassEnrolledMeets
LEC 00156670 / 150MWF 09:30–10:20
LEC 08160980 / 150Online or by arrangement
LEC 7012256112 / 9999Online or by arrangement
LEC 702237632 / 9999Online or by arrangement
TUT 10156680 / 150M 16:00–17:20
TST 20156770 / 150Feb 23 16:30–18:20
Mar 23 16:30–18:20

Resources

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Reviewed on UW Flow

69% liked it44% easy79% useful

From 557 ratings and 128 comments on UW Flow. The most helpful comments, quoted as written, without names. Read them all on UW Flow.

  • If I had a firearm loaded with one bullet and was alone in a room with Math 235, Stalin, and Hitler, I would shoot myself to permanently forget the torment this course caused me.
    Seriously though we used a frustrating note editing software called Perusall when I took this online, had to write a children's book in a group project, and the content itself was challenging and very poorly explained. If you need to take this, try and get it in person with Faisal as he's an all around good prof.

    Jan 2023 · didn’t like it · 7 found this helpfulOn UW FlowRemove this

  • Do Not Take This Course with Seda !!!
    She is extremely unengaging and disorganised and her lectures are great if you wanna fall asleep. There is no course note so if you miss anything you miss it forever. The pace control is pathetic. The first half is a super boring review of Math 136 and then it suddenly accelerates after midterm. Course content isn’t supposed to be hard, but I literally got nothing out of the lectures. Definitely avoid taking this course with a bad prof like Seda.

    Jul 2022 · didn’t like it · 3 found this helpfulOn UW FlowRemove this

  • Loved this course! I recommend doing this course right after taking MATH 136. It was pretty easy in the first half and just builds on MATH 136. I really liked taking it online - you learn a lot more by taking the time to go at your own pace. Also the professor really goes into detail on piazza questions. The biggest help was the math tutoring centre - they were essentially my teacher and were a lot of help. The only downside is that the final was pretty computational heavy and there weren't many proofs, which was the focus of the course.

    Jul 2022 · liked it · 2 found this helpfulOn UW FlowRemove this

  • A great course. The course is extremely well organized. Starting all the way from MATH 136, the content builds on each other, and this progression is taught very well in my opinion. To do well, you really need to understand the fundamentals and SPAM all practice questions and solutions available.

    Mar 2019 · liked it · 2 found this helpfulOn UW FlowRemove this

  • I was in Liam McQuay’s class, and he is the GOAT. If you get a chance to take his lectures, I strongly recommend it. He made linear algebra really interesting, and his office hours are absolutely worth attending. He is a great guy who is passionate about math and loves explaining concepts clearly. He is always supportive and more than happy to discuss assignments or quizzes with you at any time.
    If I get another chance to take one of his courses in the future, I would definitely take his class again.

    Dec 2025 · liked it · 1 found this helpfulOn UW FlowRemove this

Discussed on r/uwaterloo

1,756 posts and comments in 1,195 threads mention MATH 235, December 2011 to December 2024. Quoted word for word, newest first; each reply sits under the post and the comment that started its branch. Search r/uwaterloo for newer posts.

Fall 2024

Math 235 how important is it for actuarial science? 4 points, 4 comments

u/Interesting_Bed6243: “Did absolutely terrible and barely passed unlike my other courses.”

u/surker512: “There's some lin alg in the 300 lvl STAT classes, but it's not as deep as the content covered in MATH 235. Basic MATH 136 knowledge should be sufficient, you just need to know matrix multiplication, inverse, and transpose.”

u/_wowfantasticbaby_: “ngl math 235 barely matters. all the linear algebra you’re using later has to do with like knowing what a matrix is instead of complicated proofs (which is what I assume you did poorly in). …”

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Fucked Up Real Bad on my (1a) 17 points, 8 comments

u/YukiMang0919: “If you need to take math 136 and later on math 235, just take math 106. you just need over a 70% (I think; you should double check on the academic calendars) in math 106 to go into math 235 and you’ll be fine. for afm 101 just retake it online next term it’s so easy online”

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Bad CS student needing advice on doing math research and double majoring? 1 point, 2 comments

u/Efficient_Throat_920: “… The problem is I have a 74% average because I failed/did terribly in some CS courses but I got around a 90 average in MATH235/237/239 (but haven’t done anything past that), and I worry that I am not going to be able to get any professors to give me research opportunities or get …”

u/amsyed10385: “… So if you liked math 239, math 235, cs 341, I think that is probably a good indicator you may like CO”

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Am I cooked? 11 points, 16 comments

“Im in BBA/BMath Laurier side. Got a 57 in math135 and 50 in math137, absolutely do not want to retake this shit, but its still not technically a fail because its in between 50 and 60. …”

u/CSplays: “If you’re in CS, you’re kind of cooked for math 135 and will need to retake. However, if you’re in math, you can take math 106 I think? Idk how much that impacts your ability to take math 235 though. You’d have to ask an advisor.”

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override full class 6 points, 5 comments

“has anyone experienced getting an override on a class they need? i messed up and i need to get in a class and its only offered in the winter but its full now”

u/_sauri_: “I tried once, but they refused. It was for math 235 during the fall. I was forced to take online.”

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CS245 Post Midterm 33 points, 9 comments

“bro i got fucked so hard i havent even processed it first midterm i think i genuinely failed the fuck out of i should kms”

u/iamanaybaid555: “The averages for this midterm are pretty high, perhaps second to 251. They’ll have a horrendous final for you anyways so just a heads up”

u/milobalabilo: “gonna start studying today after math 235 lol”

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Help with Honors Mathematics 1B and 2A term 9 points, 3 comments

“For preface, I am finishing my 1A term in mathematics, and want to end up working in data science eventually, (this is important). I am in sequence 4 so I will be studying in the summer. …”

u/Dinhbaon: “You can't take the stat communications course (ENGL 378) without stat 331, so take math 235 instead in your 2A. My courses were almost the same as yours except I did CS 136 in 1B and took math 235 in 2A”

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Check it elsewhere for Fall 2026

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