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MATH 31B · Lec 1

Integration and Infinite Series

Fall 2026Gu, H.4 units

Seats, time, final and grades

Seats

Open, 2 seats left.

208 of 210 enrolled, lecture and all discussions summed.

Meets

MWF 10:00am-10:50am

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 4 days ago.

Grades

2.92
predicted, this instructor · 203 grades

203 letter grades, Gu, H..

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

dibs has seen this section open 21 times since 17 August. The last time was 29 September. 4 of those were readings where the capacity figure moved and the enrolled count did not, so dibs could not tell whether a seat existed and did not send an alert.

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

Watching is the one thing here that needs an account, because an alert needs somewhere to go. Everything else on this page works signed out.

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 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, 2 open: Dis 1C, T 10:00am-10:50am, and Dis 1F, R 10:00am-10:50am.

  • Dis 1A

    T 10:00am-10:50am

    Chang, W.

    Waitlist, 0 of 3 places taken.

  • Dis 1B

    R 10:00am-10:50am

    Chang, W.

    Waitlist, 0 of 3 places taken.

  • Dis 1C

    T 10:00am-10:50am

    Liu, H.Y.

    Open, 1 seat left.

  • Dis 1D

    R 10:00am-10:50am

    Liu, H.Y.

    Waitlist, 0 of 3 places taken.

  • Dis 1E

    T 10:00am-10:50am

    Osborne, C.

    Waitlist, 0 of 3 places taken.

  • Dis 1F

    R 10:00am-10:50am

    Osborne, C.

    Open, 1 seat left.

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 10:00am-10:50am

Discussions: T 10:00am-10:50am · R 10:00am-10:50am

Franz Hall 1178

Grades

2.92
predicted, this instructor · 203 grades

Of the 19 other 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
43%
P/NP
0%
D/F/W
14.3%

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 H. Gu

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 59 over about 2 months

21 times reopened
208 of 210 · 2 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.208 of 210 enrolled at the newest reading, 1 minute ago, with 2 left in its discussions. Seats from 17 Aug 15:07 to 2 Oct 04:30, 149 to 208. 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 (89)
Recorded Enrolled Capacity Status Waitlist Hours read
2 Oct 04:30 208 210 open 0 of 18 5 of 5
2 Oct 00:30 208 210 open 0 of 18 3 of 3
1 Oct 22:50 207 210 open 0 of 18 1 of 1
1 Oct 22:02 208 210 open 0 of 18 2 of 2
1 Oct 21:50 207 210 open 0 of 18 4 of 4
1 Oct 18:32 208 210 open 0 of 18 1 of 1
1 Oct 18:20 207 210 open 0 of 18 2 of 2
1 Oct 17:30 208 210 open 0 of 18 3 of 3
1 Oct 15:02 207 210 open 0 of 18 1 of 1
1 Oct 15:00 208 210 open 0 of 18 4 of 4
1 Oct 12:30 207 210 open 2 of 18 2 of 2
1 Oct 11:32 208 210 open 1 of 18 11 of 11
1 Oct 01:50 207 210 open 2 of 18 2 of 2
1 Oct 00:50 209 210 open 1 of 18 1 of 1
1 Oct 00:02 208 210 open 2 of 18 3 of 3
30 Sep 22:00 209 210 open 1 of 18 3 of 3
30 Sep 20:32 207 210 open 2 of 18 1 of 1
30 Sep 20:10 209 210 open 1 of 18 3 of 3
30 Sep 18:40 207 210 open 2 of 18 1 of 1
30 Sep 18:10 209 210 open 1 of 18 2 of 2
30 Sep 17:02 207 210 open 2 of 18 36 of 41
29 Sep 01:32 209 210 open 1 of 18 5 of 5
28 Sep 21:30 210 210 waitlist 1 of 18 3 of 3
28 Sep 19:40 210 210 waitlist 0 of 18 2 of 2
28 Sep 18:32 210 210 waitlist 1 of 18 2 of 2
28 Sep 17:30 210 210 waitlist 0 of 18 2 of 2
28 Sep 16:40 210 210 waitlist 1 of 18 1 of 1
28 Sep 16:00 210 210 waitlist 0 of 18 2 of 2
28 Sep 15:02 210 210 waitlist 1 of 18 15 of 15
28 Sep 01:50 210 210 waitlist 0 of 18 2 of 2
28 Sep 00:50 209 210 open 0 of 18 3 of 3
27 Sep 22:20 210 210 waitlist 0 of 18 2 of 2
27 Sep 21:32 209 210 open 0 of 18 2 of 2
27 Sep 20:20 210 210 waitlist 0 of 18 3 of 3
27 Sep 18:02 209 210 open 0 of 18 2 of 2
27 Sep 17:50 210 210 waitlist 0 of 18 1 of 1
27 Sep 17:00 209 210 open 0 of 18 17 of 17
27 Sep 01:00 210 210 waitlist 0 of 18 2 of 2
27 Sep 00:02 210 210 waitlist 1 of 18 2 of 2
26 Sep 23:50 209 210 open 1 of 18 3 of 3
26 Sep 21:20 208 210 open 2 of 18 2 of 2
26 Sep 20:32 209 210 open 1 of 18 1 of 1
26 Sep 20:20 208 210 open 2 of 18 3 of 3
26 Sep 18:40 209 210 open 1 of 18 1 of 1
26 Sep 18:00 208 210 open 2 of 18 2 of 2
26 Sep 17:02 210 210 waitlist 1 of 18 17 of 17
26 Sep 01:30 208 210 open 2 of 18 3 of 3
25 Sep 23:32 209 210 open 2 of 18 2 of 2
25 Sep 22:40 210 210 waitlist 1 of 18 1 of 1
25 Sep 22:00 209 210 open 2 of 18 2 of 2
25 Sep 21:10 210 210 waitlist 1 of 18 2 of 2
25 Sep 20:02 209 210 open 2 of 18 1 of 1
25 Sep 20:00 210 210 waitlist 1 of 18 4 of 4
25 Sep 17:30 209 210 open 2 of 18 2 of 2
25 Sep 16:32 210 210 waitlist 1 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 1 of 18 no hourly record
24 Sep 19:22 209 210 open 1 of 18 no hourly record
24 Sep 15:52 210 210 waitlist 0 of 18 no hourly record
24 Sep 12:22 209 210 open 1 of 18 no hourly record
23 Sep 14:42 210 210 waitlist 2 of 18 no hourly record
23 Sep 00:52 210 210 waitlist 3 of 18 no hourly record
22 Sep 21:22 210 210 waitlist 4 of 18 no hourly record
22 Sep 03:42 210 210 waitlist 3 of 18 no hourly record
21 Sep 23:22 210 210 waitlist 2 of 18 no hourly record
21 Sep 19:52 209 210 open 2 of 18 no hourly record
21 Sep 16:22 210 210 waitlist 2 of 18 no hourly record
21 Sep 09:22 209 210 open 2 of 18 no hourly record
21 Sep 05:52 210 210 waitlist 2 of 18 no hourly record
20 Sep 18:12 210 210 waitlist 1 of 18 no hourly record
16 Sep 22:32 210 210 waitlist 0 of 18 no hourly record
16 Sep 19:02 210 210 waitlist 1 of 18 no hourly record
16 Sep 08:32 209 210 open 1 of 18 no hourly record
15 Sep 20:52 210 210 waitlist 1 of 18 no hourly record
15 Sep 16:12 210 210 waitlist 2 of 18 no hourly record
15 Sep 12:42 210 210 waitlist 1 of 18 no hourly record
11 Sep 18:40 210 210 closed - no hourly record
10 Sep 20:40 199 210 open - no hourly record
9 Sep 22:40 198 198 closed - no hourly record
8 Sep 18:40 187 198 open - no hourly record
5 Sep 06:40 186 186 closed - no hourly record
3 Sep 18:40 174 186 open - no hourly record
26 Aug 00:40 174 174 closed - no hourly record
25 Aug 23:40 163 174 open - no hourly record
25 Aug 22:40 174 174 closed - no hourly record
24 Aug 15:41 163 174 open - no hourly record
20 Aug 17:40 162 162 closed - no hourly record
19 Aug 21:40 148 162 open - no hourly record
17 Aug 15:07 149 150 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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