{"schema_version":"ocme-site-results-v1","locale":"zh-Hant","page_type":"derivations","facts":{"questions":36000,"reviewed":36000,"display_candidates":0,"knowledge":302,"guides":299,"paths":59,"batches":360,"families":1441,"atlas":302,"core":80,"evidence":9,"formal_evidence":5,"formal_subjects":4,"lean_files":6,"lean_toolchain":"leanprover/lean4:v4.30.0","question_state":"candidate","english_state":"ai_candidate","question_Lean":"NOT_RUN","canonical_truth_promotion":false},"filters":{"q":"mko-real-bilinear-form"},"kind":"guides","total":1,"pages":1,"page":1,"entries":[{"id":"derivation-mko-real-bilinear-form-01","title":{"zh-Hant":"實雙線性形式：以矩陣公式 x^T A y 分槽證明雙線性並精確求值","en":"Real bilinear form: proving bilinearity slot by slot from x^T A y, with exact evaluation"},"summary":{"zh-Hant":"設 A=[[1,2],[−1,3]]，B(x,y)=x^T A y（x、y∈ℝ²）。分別證明 B 對第一槽與第二槽都是線性的（雙線性）；對 x=(2,−1)、y=(1,4) 精確求 B(x,y)=7 與 B(y,x)=−20，說明雙線性不要求對稱；並證明黑箱函數 f(x,y)=x1y1+(x2³−x2)y2 雖通過若干加法樣本卻不是雙線性。","en":"Let A=[[1,2],[−1,3]] and B(x,y)=x^T A y for x, y∈ℝ². Prove separately that B is linear in the first slot and in the second slot (bilinear); evaluate exactly B(x,y)=7 and B(y,x)=−20 for x=(2,−1), y=(1,4), showing that bilinearity does not require symmetry; and prove that the black-box function f(x,y)=x1y1+(x2³−x2)y2 passes some additivity samples but is not bilinear."},"mko_ids":["mko-real-bilinear-form"]}],"title":"概念推導導讀"}