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k a April Highlights and 2025 AoPS Online Class Information
jlacosta   0
Apr 2, 2025
Spring is in full swing and summer is right around the corner, what are your plans? At AoPS Online our schedule has new classes starting now through July, so be sure to keep your skills sharp and be prepared for the Fall school year! Check out the schedule of upcoming classes below.

WOOT early bird pricing is in effect, don’t miss out! If you took MathWOOT Level 2 last year, no worries, it is all new problems this year! Our Worldwide Online Olympiad Training program is for high school level competitors. AoPS designed these courses to help our top students get the deep focus they need to succeed in their specific competition goals. Check out the details at this link for all our WOOT programs in math, computer science, chemistry, and physics.

Looking for summer camps in math and language arts? Be sure to check out the video-based summer camps offered at the Virtual Campus that are 2- to 4-weeks in duration. There are middle and high school competition math camps as well as Math Beasts camps that review key topics coupled with fun explorations covering areas such as graph theory (Math Beasts Camp 6), cryptography (Math Beasts Camp 7-8), and topology (Math Beasts Camp 8-9)!

Be sure to mark your calendars for the following events:
[list][*]April 3rd (Webinar), 4pm PT/7:00pm ET, Learning with AoPS: Perspectives from a Parent, Math Camp Instructor, and University Professor
[*]April 8th (Math Jam), 4:30pm PT/7:30pm ET, 2025 MATHCOUNTS State Discussion
April 9th (Webinar), 4:00pm PT/7:00pm ET, Learn about Video-based Summer Camps at the Virtual Campus
[*]April 10th (Math Jam), 4:30pm PT/7:30pm ET, 2025 MathILy and MathILy-Er Math Jam: Multibackwards Numbers
[*]April 22nd (Webinar), 4:00pm PT/7:00pm ET, Competitive Programming at AoPS (USACO).[/list]
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0 replies
jlacosta
Apr 2, 2025
0 replies
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find f
ali666   3
N 10 minutes ago by Blackbeam999
find all valued functions $f$ such that for all real $x,y$:
$f(x-y)=f(x)f(y)$
3 replies
ali666
Aug 19, 2006
Blackbeam999
10 minutes ago
J
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Find f
Redriver   4
N 13 minutes ago by Blackbeam999
Find all $: R \to R : \ \ f(x^2+f(y))=y+f^2(x)$
4 replies
Redriver
Jun 25, 2006
Blackbeam999
13 minutes ago
J
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2^x+3^x = yx^2
truongphatt2668   7
N 15 minutes ago by Jackson0423
Prove that the following equation has infinite integer solutions:
$$2^x+3^x = yx^2$$
7 replies
truongphatt2668
Apr 22, 2025
Jackson0423
15 minutes ago
J
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Question on Balkan SL
Fmimch   1
N an hour ago by Fmimch
Does anyone know where to find the Balkan MO Shortlist 2024? If you have the file, could you send in this thread? Thank you!
1 reply
Fmimch
6 hours ago
Fmimch
an hour ago
J
No more topics!
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Concurrent related to Neuberg cubic
TelvCohl   1
N Sep 25, 2019 by rodinos
Source: Own
Let $ P $ be a point lying on the Neuberg cubic of $ \triangle ABC $ and let $ O_a, $ $ O_b, $ $ O_c $ be the circumcenter of $ \triangle BPC, $ $ \triangle CPA, $ $ \triangle APB, $ respectively. Prove that the reflection of $ AP, $ $ BP, $ $ CP $ in $ AO_a, $ $ BO_b, $ $ CO_c, $ respectively are concurrent.
1 reply
TelvCohl
Dec 28, 2016
rodinos
Sep 25, 2019
J
Concurrent related to Neuberg cubic
G H J
Reveal topic tags
geometry proposed
geometry
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G H BBookmark kLocked kLocked NReply
Source: Own
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TelvCohl
2312 posts
TelvCohl
#1 h  Dec 28, 2016, 1:32 AM • 7 Y
Y by baopbc, qzc, AmirKhusrau, amar_04, enhanced, Adventure10, Mango247
Let $ P $ be a point lying on the Neuberg cubic of $ \triangle ABC $ and let $ O_a, $ $ O_b, $ $ O_c $ be the circumcenter of $ \triangle BPC, $ $ \triangle CPA, $ $ \triangle APB, $ respectively. Prove that the reflection of $ AP, $ $ BP, $ $ CP $ in $ AO_a, $ $ BO_b, $ $ CO_c, $ respectively are concurrent.
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rodinos
317 posts
rodinos
#2 h  Sep 25, 2019, 4:37 PM • 1 Y
Y by Adventure10
New triangle centers

https://groups.yahoo.com/neo/groups/Hyacinthos/conversations/messages/29538
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