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MATH 31B · Lec 3

Integration and Infinite Series

Fall 2026Wang, A.Y.4 units

Seats, time, final and grades

Seats

Waitlist, 0 of 18 places taken.

210 of 210 enrolled, lecture and all discussions summed.

Meets

MWF 2:00pm-2:50pm

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

Final

Tue 8 Dec, 6:30pm to 9:30pm

One exam for the whole class, Los Angeles time.

Read 35 hours ago.

Grades

3.08
predicted, all instructors · 6,721 grades

6,721 letter grades, everyone who has taught MATH 31B.

Read 1 minute ago. This is a recent reading, not a live seat count.

dibs has seen this section open 8 times since 17 August. The last time was 1 October.

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

A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.

Before you can enroll

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

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. Enrollment is contingent on taking and passing the Mathematics Diagnostic Test. There will be two MANDATORY midterm examinations from 6 to 7:50 p.m. on Monday, October 19 and Friday, November 20, 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 35 hours ago.

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 0 of 18.

No discussion is open. 6 discussions have 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 2:00pm-2:50pm

    Rai, K.

    Waitlist, 0 of 3 places taken.

  • Dis 3B

    R 2:00pm-2:50pm

    Rai, K.

    Waitlist, 0 of 3 places taken.

  • Dis 3C

    T 2:00pm-2:50pm

    Yoshida, J.

    Waitlist, 0 of 3 places taken.

  • Dis 3D

    R 2:00pm-2:50pm

    Yoshida, J.

    Waitlist, 0 of 3 places taken.

  • Dis 3E

    T 2:00pm-2:50pm

    Knudson, A.

    Waitlist, 0 of 3 places taken.

  • Dis 3F

    R 2:00pm-2:50pm

    Knudson, A.

    Waitlist, 0 of 3 places taken.

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 2:00pm-2:50pm

Bunche Hall 1209B

Grades

3.08
predicted, all instructors · 6,721 grades

Of the 20 people in the grade record for MATH 31B, the 2 with the most grades: SANCHEZ OCAL, PABLO at 3.10 over 751 grades and XIONG, HAOREN at 2.91 over 674 grades.

A range
47%
P/NP
<1%
D/F/W
8.3%

Full grade history for MATH 31B

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

  • 2 exams, said by 7 reviewers
  • 3 quizzes, said by 3 reviewers
  • Problem sets mentioned, no number given, said by 6 reviewers

Read from 818 reviews 26 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 31B Search the reviews for A.Y. Wang

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.

  • 18221F
  • 21722W
  • 19722S
  • 20222F
  • 18023W
  • 28123S
  • 21023F
  • 20224W
  • 21724F
  • 19325W
  • 14425S
  • 20825F
Enrollment by term: 21F 182, 22W 217, 22S 197, 22F 202, 23W 180, 23S 281, 23F 210, 24W 202, 24F 217, 25W 193, 25S 144, 25F 208

Peak 281 · most recent 25F at 208

Seats over time

Filled by 77 over about 2 months

8 times reopened
210 of 210 · no seats left in its discussions
17 Aug 15:079 Sep 09:482 Oct 04:30
dibs read 168 of the 173 hours its hourly record covers, 97%, and did not look in 5. dibs had no hourly record before 25 Sep, which is the other 921 of 1094 plotted.210 of 210 enrolled at the newest reading, 1 minute ago, and no seats left in its discussions. Seats from 17 Aug 15:07 to 2 Oct 04:30, 133 to 210. dibs read 168 of the 173 hours its hourly record here covers, 97%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 5 hours dibs was keeping a record and did not reach this section. Nothing before 25 September at 00:00, where this section's record starts, has a read either way, which is 921 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: 1 minute ago.

Show the readings (83)
Recorded Enrolled Capacity Status Waitlist Hours read
2 Oct 04:30 210 210 waitlist 0 of 18 4 of 4
2 Oct 01:10 210 210 waitlist 0 of 18 2 of 2
2 Oct 00:30 210 210 waitlist 2 of 18 3 of 3
1 Oct 22:50 210 210 waitlist 1 of 18 1 of 1
1 Oct 22:02 210 210 waitlist 0 of 18 2 of 2
1 Oct 21:50 210 210 waitlist 1 of 18 3 of 3
1 Oct 19:30 210 210 waitlist 2 of 18 2 of 2
1 Oct 18:32 210 210 waitlist 0 of 18 1 of 1
1 Oct 18:20 210 210 waitlist 1 of 18 2 of 2
1 Oct 17:30 210 210 waitlist 2 of 18 3 of 3
1 Oct 15:02 210 210 waitlist 1 of 18 1 of 1
1 Oct 15:00 210 210 waitlist 2 of 18 4 of 4
1 Oct 12:30 209 210 open 2 of 18 2 of 2
1 Oct 11:32 210 210 waitlist 2 of 18 58 of 63
28 Sep 21:30 209 210 open 2 of 18 3 of 3
28 Sep 19:40 208 210 open 1 of 18 2 of 2
28 Sep 18:32 209 210 open 2 of 18 3 of 3
28 Sep 16:00 208 210 open 1 of 18 2 of 2
28 Sep 15:02 207 210 open 1 of 18 15 of 15
28 Sep 01:02 208 210 open 1 of 18 2 of 2
28 Sep 00:50 208 210 open 2 of 18 3 of 3
27 Sep 22:20 207 210 open 2 of 18 2 of 2
27 Sep 21:32 208 210 open 1 of 18 2 of 2
27 Sep 20:20 207 210 open 2 of 18 3 of 3
27 Sep 18:50 208 210 open 2 of 18 1 of 1
27 Sep 18:02 208 210 open 3 of 18 2 of 2
27 Sep 17:50 207 210 open 2 of 18 1 of 1
27 Sep 17:00 208 210 open 2 of 18 17 of 17
27 Sep 01:00 207 210 open 2 of 18 2 of 2
27 Sep 00:02 206 210 open 2 of 18 7 of 7
26 Sep 18:00 207 210 open 2 of 18 2 of 2
26 Sep 17:02 206 210 open 2 of 18 17 of 17
26 Sep 01:30 207 210 open 2 of 18 2 of 2
26 Sep 00:30 210 210 waitlist 2 of 18 2 of 2
25 Sep 23:32 208 210 open 2 of 18 3 of 3
25 Sep 21:10 210 210 waitlist 2 of 18 2 of 2
25 Sep 20:02 208 210 open 2 of 18 5 of 5
25 Sep 16:30 210 210 waitlist 2 of 18 2 of 2
25 Sep 15:40 209 210 open 2 of 18 16 of 18, 2 no hourly record
24 Sep 22:52 210 210 waitlist 2 of 18 no hourly record
24 Sep 15:52 210 210 waitlist 3 of 18 no hourly record
24 Sep 12:22 210 210 waitlist 2 of 18 no hourly record
24 Sep 08:52 209 210 open 0 of 18 no hourly record
24 Sep 05:22 210 210 waitlist 0 of 18 no hourly record
23 Sep 17:52 209 210 open 0 of 18 no hourly record
23 Sep 04:32 210 210 waitlist 1 of 18 no hourly record
23 Sep 00:52 210 210 waitlist 2 of 18 no hourly record
22 Sep 21:22 210 210 waitlist 1 of 18 no hourly record
22 Sep 03:42 210 210 waitlist 2 of 18 no hourly record
20 Sep 18:12 210 210 waitlist 1 of 18 no hourly record
18 Sep 18:32 210 210 waitlist 2 of 18 no hourly record
18 Sep 04:32 209 210 open 2 of 18 no hourly record
16 Sep 19:02 210 210 waitlist 2 of 18 no hourly record
16 Sep 01:32 210 210 waitlist 3 of 18 no hourly record
15 Sep 20:52 210 210 waitlist 4 of 18 no hourly record
15 Sep 16:12 210 210 waitlist 3 of 18 no hourly record
15 Sep 12:42 210 210 waitlist 1 of 18 no hourly record
15 Sep 01:12 184 210 open - no hourly record
14 Sep 21:42 185 210 open - no hourly record
14 Sep 14:42 186 210 open - no hourly record
12 Sep 01:22 185 210 open - no hourly record
11 Sep 23:02 180 210 open - no hourly record
11 Sep 18:40 185 210 open - no hourly record
10 Sep 20:40 170 210 open - no hourly record
9 Sep 22:40 170 199 open - no hourly record
8 Sep 18:40 161 199 open - no hourly record
5 Sep 06:40 161 187 open - no hourly record
4 Sep 01:40 149 187 open - no hourly record
3 Sep 18:40 150 187 open - no hourly record
2 Sep 01:40 150 175 open - no hourly record
1 Sep 02:40 149 175 open - no hourly record
28 Aug 01:40 151 175 open - no hourly record
27 Aug 22:40 150 175 open - no hourly record
27 Aug 21:40 151 175 open - no hourly record
27 Aug 20:40 150 175 open - no hourly record
27 Aug 19:40 151 175 open - no hourly record
26 Aug 00:40 150 175 open - no hourly record
25 Aug 23:40 142 175 open - no hourly record
25 Aug 22:40 150 175 open - no hourly record
24 Aug 15:41 142 175 open - no hourly record
20 Aug 17:40 142 163 open - no hourly record
19 Aug 21:40 133 163 open - no hourly record
17 Aug 15:07 133 151 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.

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