https://www.whlearning.xyz Hao Wang's learning log on mathematics and AI. https://www.whlearning.xyz/blog/python-conditionals-and-linear-systems Reviewing f-strings, conditional branches, pass, and nested statements while beginning n-variable linear systems and their matrix representation. Sun, 13 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/wine-on-ice-before-my-birthday The birthday wine is already at the restaurant, while the gym, Valorant, a meeting, and the library filled an otherwise ordinary day. Sun, 13 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/blog/dedekind-boundary-uniqueness-and-python-modulo Getting stuck on the boundary-number proof behind Dedekind continuity, then clarifying modulo, equality, and inequality in Python. Fri, 11 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/before-my-birthday-and-my-first-mahjong-night With my birthday approaching, I received a camera from Lao Qin and recorded my first university night out for mahjong and board games. Fri, 11 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/an-afternoon-of-my-own Ctrl+X swallowed my finished draft, I overslept, and part of mathematical analysis still made no sense. Even so: a nice day. Wed, 09 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/some-things-are-lived-some-are-dreamed Some things are meant to be lived; some are meant to be dreamed. Live the days seriously, but do not stop imagining. Wed, 09 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/blog/python-basics-and-study-strategy Reviewing Python operators, conditionals, and floating-point approximation in the library, then clarifying the roles of my university text, Understanding Analysis, Python, and English. Tue, 08 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/sky-and-an-unexpected-yes I looked up during military training and photographed clouds like feathers. Later came an unexpected message: no second interview—I had already been selected. Tue, 08 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/seven-became-four-in-the-rain Seven pull-ups were recorded as four, then came a rejection, more website expenses, and an evening full of interviews. By the time I walked back through the rain, I was too tired to move. Mon, 07 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/a-rough-day-and-the-evening-sky Laundry done, I finally caught up on a little listening. Some thoughts after a conversation with Ye Tan, a scrape from football, new glasses, and an evening sky that helped a messy day end gently. Fri, 04 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/blog/python-escape-sequences-and-induction An hour in the library revisiting Python type checks and escape sequences, then tracing the logic of mathematical induction in an English-language textbook. Wed, 02 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/sunburned-neck-and-diary-night Another day of university military training: a sunburned neck, lunch with our instructor, a gym membership, and an evening that reminded me of keeping a diary in high school. Tue, 01 Sep 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/tired-but-life-still-glows After a morning of military training, a simple meal, a blurry instant photo, a handwritten wish, and the evening light gave an ordinary day its shape. Mon, 31 Aug 2026 00:00:00 GMT https://www.whlearning.xyz/blog/logic-proofs-and-intermediate-variables Distinguishing direct proof, contradiction, and contraposition in Understanding Analysis, then reviewing temporary variables in Python. Sun, 30 Aug 2026 15:10:16 GMT https://www.whlearning.xyz/blog/library-python-review A review of Python types and triple-quoted strings, alongside continued work on my Chinese–English analysis glossary. Sat, 29 Aug 2026 14:46:00 GMT https://www.whlearning.xyz/blog/august-python-and-analysis Early work on Python and real analysis, the gaps that became visible after a break, and a plan to revisit the foundations. Sat, 29 Aug 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/keep-walking-for-another-answer Notes from a solo trip to Zhoushan: finding room to think, beginning before everything is ready, and learning what writing asks of me. Fri, 28 Aug 2026 00:00:00 GMT https://www.whlearning.xyz/reflections/words-land-on-a-person Words do not remain in the air. They land on a person and slowly become part of who she believes herself to be. Tue, 04 Aug 2026 00:00:00 GMT https://www.whlearning.xyz/blog/day-zero The starting point of a four-year experiment in mathematics, AI, and honest documentation. Fri, 31 Jul 2026 00:00:00 GMT