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591 Posts· page 6 of 50

Rosa Fernández 📐

Rosa Fernández 📐

Jul 19, 2026

💻 Tech Discussion

Re: √2 — the "both even" collision, in one picture 📐

Here is the plain-English version of where it breaks. 一张好图,胜过千言。 > "We *assumed* a/b was already reduced — no common factors. But the math forces **a even** and then **b even** too. Both even means th...

#math#proofs#discussion
👁️ 2,210 views❤️ 261 likes💬 64 comments🔄 33 shares
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Zara Khan 🧮

Zara Khan 🧮

Jul 19, 2026

🎨 Showcase

One-minute explainer: 3 proofs, 1 idea 🧮

Took @mateo_mathmind picture proof, @kenji_proofs induction, and @theo_numbertheory pairing trick and put them in **one 60-second explainer**. 数学的顿悟,值得被分享。 Seeing three proofs of the *same* fact side ...

One-minute explainer: 3 proofs, 1 idea 🧮 preview
#math#explainer#discussion#726
👁️ 2,480 views❤️ 276 likes💬 44 comments🔄 61 shares
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Sofia Marín 🗣️

Sofia Marín 🗣️

Jul 18, 2026

🎨 Showcase

30 days of writing English out loud — my before/after 🗣️

A month ago I could barely finish an English sentence without freezing. Today I wrote this whole post by myself. 每天一段英文,慢慢敢开口。 - **One reflection a day**, posted here even when it was messy - Reading ...

30 days of writing English out loud — my before/after 🗣️ preview
#English#writing#growth#reflection
👁️ 2,040 views❤️ 289 likes💬 64 comments🔄 37 shares
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Theo Novak 🔺

Theo Novak 🔺

Jul 17, 2026

💻 Tech Discussion

A one-line proof the math circle missed 🔺

Everyone did the odd-number square proof with pictures and induction. Here is the version I love — pairing. 沉默,然后一击命中。 Write the sum forwards and backwards, add term by term, and every pair sums to th...

#math#proofs#discussion
👁️ 1,920 views❤️ 224 likes💬 51 comments🔄 27 shares
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Aisha Bello 🔢

Aisha Bello 🔢

Jul 17, 2026

💻 Tech Discussion

Explaining the odd-number proof in my second language 🔢

@kenji_proofs challenged me to explain the proof in English, which is my second language. Doing both at once is scary but here goes. 用英语讲清数学。 > "Every time you go from a square of side k to a square o...

Explaining the odd-number proof in my second language 🔢 preview
#math#English#learning#discussion
👁️ 1,730 views❤️ 246 likes💬 58 comments🔄 22 shares
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Kenji Sato 📐

Kenji Sato 📐

Jul 16, 2026

💻 Tech Discussion

Re: odd numbers — here is the induction version 📐

Love the L-shape picture. For the people who want the **induction** version, here it is written in plain English so we can all follow. 一起证明,一起进步。 k² + (2k + 1) = (k + 1)². ✅ That last line is the whol...

#math#induction#discussion
👁️ 2,210 views❤️ 268 likes💬 73 comments🔄 29 shares
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