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MATH 33A · Lec 3

Linear Algebra and Applications

Fall 2026Sempliner, J.4 units

Seats, time, final and grades

Seats

Waitlist, 17 of 18 places taken.

210 of 210 enrolled, lecture and all discussions summed.

Meets

MWF 12:00pm-12:50pm

Lecture only. You also attend a discussion, listed below.

Final

Thu 10 Dec, 6:30pm to 9:30pm

One exam for the whole class, Los Angeles time.

Read 4 days ago.

Grades

3.48
predicted, all instructors · 5,123 grades

5,123 letter grades, everyone who has taught MATH 33A.

Read 2 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.

Join the waitlist on the registrar (opens in a new tab) Sign in to watch for an opening

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Put this class on a board

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Before you can enroll

Tell dibs what you have already taken and this line will say which of these you have. Your list.

The registrar says this two ways. Its requisites table calls the requisite above a warning, so enrollment is not blocked, and its course description for MATH 33A calls the same requisite enforced. dibs follows the table and cannot tell you which one the department will act on. Read the registrar's own page.

From the registrar limited early, then open

Information on the Mathematics Diagnostic Test and Advanced Placement (AP) credit is available at https://uclamathugrad.zendesk.com/ . Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m. See https://ww3.math.ucla.edu/enrollment-into-math-and-programming-in-computing-pic-courses/ for more information. There will be two MANDATORY midterm examinations from 6 to 7:50 p.m. on the following Thursdays: October 22 and November 19, 2026.

The limit stands until 15 September, and lifts then. dibs still counts this class as one you can take, but not yet.

Restrictions read 4 days ago. dibs re-reads these slowly because they rarely change; watch the section and it moves to every 6 hours.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

6 discussions, none open. The way in is the lecture's waitlist, at 17 of 18.

No discussion is open. 1 discussion has a waitlist with room. A place on one is not a seat: it is a queue the department may or may not clear.
  • Dis 3A

    T 12:00pm-12:50pm

    Woo, J.

    Waitlist, 2 of 3 places taken.

  • Dis 3B

    R 12:00pm-12:50pm

    Woo, J.

    Closed.

  • Dis 3C

    T 12:00pm-12:50pm

    Han, Z.

    Closed.

  • Dis 3D

    R 12:00pm-12:50pm

    Han, Z.

    Closed.

  • Dis 3E

    T 12:00pm-12:50pm

    Martinez, T.C.

    Closed.

  • Dis 3F

    R 12:00pm-12:50pm

    Martinez, T.C.

    Closed.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: MWF 12:00pm-12:50pm

Bunche Hall 1209B

Grades

3.48
predicted, all instructors · 5,123 grades

Of the 16 other people in the grade record for MATH 33A, the 2 with the most grades: NIENHAUS, JAN at 3.42 over 660 grades and SANCHEZ OCAL, PABLO at 3.85 over 575 grades.

A range
66%
P/NP
<1%
D/F/W
3.7%

Full grade history for MATH 33A

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

What the work looks like

  • Exams mentioned, no number given, said by 5 reviewers
  • Quizzes mentioned, no number given, said by 5 reviewers
  • Problem sets mentioned, no number given, said by 5 reviewers

Read from 676 reviews 17 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.

Reviews for MATH 33A Search the reviews for J. Sempliner

Will it still be here

high risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 15621F
  • 19622W
  • 20822F
  • 23823W
  • 26623S
  • 24324W
  • 21624S
  • 22525W
  • 16625S
  • 21925F
Enrollment by term: 21F 156, 22W 196, 22F 208, 23W 238, 23S 266, 24W 243, 24S 216, 25W 225, 25S 166, 25F 219

Peak 266 · most recent 25F at 219

Seats over time

Nothing read since 2 Oct, 2 hours ago. Over about 2 months before that, filled by 35.

1 time reopened
210 of 210 · no seats left in its discussions
17 Aug 15:079 Sep 08:492 Oct 02:32 · 2 hours ago
dibs read 168 of the 700 hours its hourly record covers, 24%, and did not look in 532. dibs had no hourly record before 2 Sep, which is the other 392 of 1092 plotted.210 of 210 enrolled at the newest reading, 2 hours ago, and no seats left in its discussions. Seats from 17 Aug 15:07 to 2 Oct 02:32, 175 to 210. dibs read 168 of the 700 hours its hourly record here covers, 24%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 532 hours dibs was keeping a record and did not reach this section. Nothing before 2 September at 23:00, where this section's record starts, has a read either way, which is 392 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not, and that was 2 hours ago. It is where the line stops, not where the count is now.

Show the readings (26)
Recorded Enrolled Capacity Status Waitlist Hours read
2 Oct 02:32 210 210 waitlist 17 of 18 8 of 27
1 Oct 00:02 210 210 waitlist 17 of 18 16 of 55
28 Sep 18:32 210 210 closed 18 of 18 6 of 18
28 Sep 01:02 210 210 waitlist 17 of 18 11 of 37
26 Sep 13:32 210 210 closed 18 of 18 4 of 11
26 Sep 03:02 210 210 waitlist 17 of 18 72 of 256
15 Sep 12:42 210 210 closed 18 of 18 25 of 84
12 Sep 01:22 197 210 open - 4 of 8
11 Sep 18:40 198 210 open - 4 of 23
10 Sep 20:40 196 210 open - 4 of 23
9 Sep 22:40 196 204 open - 5 of 29
8 Sep 18:40 195 204 open - 16 of 121
3 Sep 18:40 194 199 open - 3 of 17
3 Sep 02:40 194 194 closed - 3 of 49, 45 no hourly record
1 Sep 02:40 193 194 open - no hourly record
28 Aug 01:40 191 194 open - no hourly record
27 Aug 22:40 190 194 open - no hourly record
27 Aug 21:40 191 194 open - no hourly record
27 Aug 20:40 190 194 open - no hourly record
27 Aug 19:40 191 194 open - no hourly record
26 Aug 00:40 190 194 open - no hourly record
24 Aug 21:40 181 194 open - no hourly record
20 Aug 17:40 182 188 open - no hourly record
19 Aug 21:40 176 188 open - no hourly record
18 Aug 19:40 176 183 open - no hourly record
17 Aug 15:07 175 183 open - -
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

Class chat

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