Explain first; keep limits visible
Research
Research contains explanation-led work. The three newly supplied interactive pages are visible but marked beta / 未完成 while their wording, interaction, and numerical expressions are checked.
interactive explainers
Three public betas, not three finished claims.
The pages are preserved as working explainers. Their beta label is part of the content-honesty contract, not decoration.
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01
spin ½ — two turns to closeThe authoritative replacement includes a Dirac belt that returns to a flat state at 720°.
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02
hypersurfaceA scroll-led explanation through constraint, slice, projection, and ambient dimension.
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03
AK–MCS — learning the boundaryKnown incomplete: interaction, wording, and numerical expressions are still under review.
research practice