{"blog_url":"https://chaos-r.hatenadiary.jp/","version":"1.0","blog_title":"Ken-Chaos\u2019s Random Notes on R","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchaos-r.hatenadiary.jp%2Fentry%2F2026%2F01%2F16%2F105116\" title=\"Weak-Stationarity-Centered Thinking: A Mathematical Idealization, Not a Real-World Requirement - Ken-Chaos\u2019s Random Notes on R\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"In most textbooks on time series analysis, the concept of weak stationarity (or weak-sense stationarity) is introduced as a prerequisite for analysis. Understanding this assumption is certainly useful for organizing the theoretical framework and following mathematical arguments. However, in practica\u2026","categories":["Fundamentals of Time Series Analysis","stochastic process","time series analysis"],"url":"https://chaos-r.hatenadiary.jp/entry/2026/01/16/105116","author_name":"chaos_kiyono","author_url":"https://blog.hatena.ne.jp/chaos_kiyono/","title":"Weak-Stationarity-Centered Thinking: A Mathematical Idealization, Not a Real-World Requirement","provider_url":"https://hatena.blog","type":"rich","height":"190","width":"100%","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/c/chaos_kiyono/20260114/20260114211755.png","published":"2026-01-16 10:51:16"}