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Channel

tropical saint petersburg

@tropicalgeometry

On this record: Topic · Growth · Engagement · Reactions · Posts · Citations · Cite this entry

3,249subscribers

+76 since we began measuring on 6 August 2026

Risers and fallers across the register · movement among entries of 3,162–10,000.

Register entry

Telegram ID-1001236703491
TypeChannel
Username@tropicalgeometry
Created3 May 2020 — measured — cross-checked against a third-party dataset (ext.tg_channel)
First recorded6 August 2026
Last confirmed live26 September 2026
Measurements held14
Confirmed unchanged1 time, most recently 26 September 2026
On Telegramt.me/tropicalgeometry

Topic

Other / unclassifiable — a classification, not a measurement. An on-box language model (Qwen3.6-35B-A3B-FP8, prompt version 1) read this channel’s own recent posts on 14 September 2026 and assigned it the closest of 31 fixed categories, at 93% confidence. This is a model’s judgement about what the channel is likely to be about, not a fact this register measured the way a subscriber count or a view count is measured — it can be revised on a later pass, and it carries no weight anywhere else on this page. How this classification works, and why it has no browse page of its own yet.

Growth

3,1723,2493,210.56 August 2026 — 3,173 subscribers6 August 2026 — 3,173 subscribers6 August 2026 — 3,172 subscribers10 August 2026 — 3,177 subscribers13 August 2026 — 3,189 subscribers16 August 2026 — 3,195 subscribers19 August 2026 — 3,197 subscribers23 August 2026 — 3,198 subscribers26 August 2026 — 3,205 subscribers29 August 2026 — 3,209 subscribers5 September 2026 — 3,213 subscribers10 September 2026 — 3,215 subscribers14 September 2026 — 3,218 subscribers26 September 2026 — 3,249 subscribers6 August 202626 September 2026
14 measurements spanning 51 days, net +76. Dots are measurements; the straight line between them is drawn to join them, not to claim we know the path taken in between — snapshots are recorded only when a count changes, so gaps mean “no change observed”, never “interpolated”. The vertical axis spans 3,160–3,261 and does not start at zero.
Measurement log — every subscribers count we have recorded
Measured (UTC)SubscribersChange
26 Sept 2026, 19:563,249+31
14 Sept 2026, 04:153,218+3
10 Sept 2026, 12:213,215+2
5 Sept 2026, 16:573,213+4
29 Aug 2026, 06:273,209+4
26 Aug 2026, 04:343,205+7
23 Aug 2026, 05:463,198+1
19 Aug 2026, 23:173,197+2
16 Aug 2026, 19:373,195+6
13 Aug 2026, 07:343,189+12
10 Aug 2026, 05:143,177+5
6 Aug 2026, 22:343,172-1
6 Aug 2026, 11:013,173no change
6 Aug 2026, 09:513,173first reading

Engagement

13 posts held, back to 7 July 2026 — the reader has not yet reached the start of this channel’s public history, so older posts may sit further back, unread. Read across 3 pages of Telegram’s post history, 20 posts per page.

Nothing published in the last 30 days. ERR and ER are rolling 30-day measures, so there is nothing to compute — we hold 13 posts for this entry, the most recent from 5 August 2026. An engagement rate over an empty window would be a number about nothing.

Reaction mix

336 reactions across 13 posts, in 19 distinct kinds. The most used accounts for 39.6% of them.

Every reaction kind recorded on the sample, most used first
ReactionCountShareShare, drawn
❤13339.6%
🥰3410.1%
👍339.82%
🔥278.04%
😁236.85%
🎉123.57%
😱113.27%
🤯102.98%
🤷‍♂102.98%
😢92.68%
😍82.38%
💯61.79%
❤‍🔥51.49%
🌚51.49%
👏30.893%
🍾20.595%
👎20.595%
🤔20.595%
🤬10.298%

No sentiment is inferred, and none should be read in. This table is ordered by count and by nothing else. Emoji do not carry stable meaning across languages or communities — 🙏 is thanks in one channel and mourning in another — so we publish which ones were pressed and how often, and pass no judgement on what an audience meant by them.

Precision. Telegram publishes reaction counts per emoji and short-forms each one — 4.34K, 1.2M — so any single kind at or above 1,000 reaches us at three significant figures, and only counts below 1,000 are exact. The shares above are ratios of those figures and carry the same error. This is also why the total here can differ slightly from a reaction total printed elsewhere on the page: both are sums of the same rounded parts, taken over samples with different edges.

Coverage. Reactions were read on 13 of the 13 sampled posts in this sample. Summed by Telegram’s own count on each post — not by adding up the per-emoji breakdown above — those same posts carry 336 reactions in total: the kind of figure the paragraph above means by “a reaction total printed elsewhere on the page”.

Measured over the 13 most recent posts we hold, published 7 July 2026 to 5 August 2026, using the newest reading held for each. Telegram Stars are excluded: they are a payment, not a reaction, and they have their own section.

Recent posts

5 Aug 2026, 17:23 UTC975 views26 reactionsread 7 August 2026
Photo

Похоже ж!

🤷‍♂10😍8🤯4👎2🤔2

31 Jul 2026, 17:09 UTC≈2,130 views34 reactionsread 7 August 2026

Иван Ященко открыл Дубну этого года (Царскосельскую) словами: Тот подарил египтянам письменность, но верховный жрец Тамус отреагировал негативно: Изобретатель не лучший судья пользы своего изобретения! Письменность ослабит память! Она даёт лишь видимость знания! Люди будут казаться всезнающими, оставаясь по большей части невеждами! Текст не умеет отвечать! (или это уже Сократ/Платон добавил?) Конец знания и цивилизац…

❤31😱3

31 Jul 2026, 16:57 UTC≈1,700 views43 reactionsread 7 August 2026

Бакалаврские (и, возможно, магистерские) дипломы теперь должны писаться (или читаться? в любом случае, усваиваться) как дон Кихот Пьера Менара: если текст легко может быть написан ИИ, то не лучше ли взять что-то классическое, или же, например, текст, написанный тем же ИИ, но под вдумчивым контролем научного руководителя? Итак, ученик должен будет прочувствовать каждую строчку текста, пояснить, почему писать надо име…

😁21🔥10❤8🤯3🤬1

25 Jul 2026, 20:59 UTC≈2,470 views28 reactionsread 7 August 2026
File

Сделал epub с формулами

❤21👍7

25 Jul 2026, 20:59 UTC≈2,330 views28 reactionsread 7 August 2026

Леонид сделал epub с книгой по Санкт-Петербургским математикам и их открытиям, с картинками и формулами! Большое ему спасибо! Читайте с читалок!

🥰20👍8

15 Jul 2026, 09:01 UTC≈2,880 views36 reactionsread 7 August 2026
Photo

примечательные статьи выходят. Я так себе будущее и представляю: математики приносят подношения Мардуку в виде текстов, кто побогаче, тем AI Ultra помогает, кто победнее или у кого фантазия настолько дикая, что AI Ultra не справляется, сам. Сейчас приношения оформлены в виду выкладывания на архив, но в постапокалипсисе нужно будет напечатанный текст приносить в храм ( ну или на дискетке, если большой, или чипом из мо…

❤17😢9🌚5🔥2😁2😱1

9 Jul 2026, 05:24 UTC≈2,880 views32 reactionsread 7 August 2026

из Апери: ... музыка по существу располагается во времени. Мелодия — не множество, а последовательность тонко связанных нот: в отличие от памятников, которые продолжают существовать, мелодия исчезает; чтобы снова появиться, она должна быть воспроизведена; она сохраняется искусственными средствами запоминания — музыкальными партитурами, пластинками. Мы знаем орудия или рисунки наших доисторических предков; мы не знае…

❤23💯6😱3

8 Jul 2026, 10:44 UTC≈1,840 views58 reactionsread 7 August 2026
File

Tropical curves in sandpile models, Nikita Kalinin, Mikhail Shkolnikov, Advances in Mathematics 502 (2026) 111127. Очень рад. Наконец, опубликовалась статья (10 лет публиковали).

❤26🔥15🎉12🍾2👍2👏1

8 Jul 2026, 06:36 UTC≈1,770 views10 reactionsread 7 August 2026
Photo

продолжение перевода (предыдущие части: 1, 2, 3, 4, 5, 6) Окончание доказательства иррациональности дзета(3) по Апери, по модулю тривиальных вычислительных проверок

❤‍🔥5👏2🥰2😱1

8 Jul 2026, 05:59 UTC≈1,760 views8 reactionsread 7 August 2026
Photo

продолжение перевода (предыдущие части: 1, 2, 3, 4, 5) где получают элементарные теоретико-числовые оценки на рост, а затем происходит МАГИЯ из ВЫЧИСЛИТЕЛЬНЫХ методов, которые студенты-математики обычно не очень ценят.

🥰7😱1

7 Jul 2026, 11:08 UTC≈1,420 views16 reactionsread 7 August 2026
Photo

продолжение перевода (предыдущие части: 1, 2, 3, 4) где выясняется, что бесконечная сумма (1), которая сходится не понятно при каких a_i, вообще и не нужна. (на докладе Апери писал именно бесконечные суммы, более того, с нулями в знаменателе! так он выражал протест против формальной математике, верификации и всему такому)

❤7🥰5🤯3😱1

7 Jul 2026, 02:42 UTC≈1,570 views10 reactionsread 7 August 2026
Photo

продолжение перевода, предыдущие части: 1, 2, 3. А здесь красивейшее вычисление Эйлера. Вопросы сходимости, согласно стилю статьи, игнорируются.

👍9😱1

Showing the 12 most recent of 13 posts we hold for @tropicalgeometry. View and reaction counts are the latest single reading for each post, not a live figure, and a recent post is still accumulating both. A view count marked ≈ was rounded by Telegram before we ever saw it — t.me prints views in full below 1,000 and to three significant figures above, so ≈1,200,000 means somewhere between 1,150,000 and 1,249,999. Unmarked counts are exact. Text is reproduced from the public post preview and truncated for length.

Forward network

Built only from forwarded posts we have actually read, on both sides. Coverage is early and deliberately incomplete: a missing link means we have not read the post that would prove it, never that the relationship does not exist. Counts are distinct forwarded posts observed, so they only ever go up as we read more.

Mentions

Named by 3 registered channels — every channel on the register whose own posts have named this one, by its current username or any other username it currently holds, merged from two separately captured readings of the same fact so a namer caught by only one of them is not missed and a namer both caught is not counted twice. A username this channel has since dropped is not matched — that handle may belong to someone else now, and crediting today’s namer to yesterday’s owner would misattribute it.

A mention is a weaker signal than a forward and is counted separately for that reason — naming a channel is not republishing it, and a handle in a post body is easy to place deliberately. The post counts beside each row below are distinct posts in which the handle appeared, from posts we have read on both sides — the “Named by N registered channels” figure above is a different count, of distinct NAMING CHANNELS rather than posts, and is not the sum of the rows under it.

Cite this entry

A live page changes as we take new readings, so a citation should name the measurement it is based on, not just the URL. The line below cites the subscriber count as measured 26 September 2026 — this entry's latest reading, not the date you are reading this.

“tropical saint petersburg” (@tropicalgeometry), 3,249 subscribers as measured 26 September 2026. Telegram Register, tgregister.com/channel/tropicalgeometry.

Full measurement history, CC BY 4.0. Every reading this register holds for this entry, not just the latest one, as a dated, downloadable record: CSV · JSON. Free to use with attribution to tgregister.com. Each file carries its own generation timestamp, which is the figure to cite for exactly when the data was retrieved.