The Eigenvector Points to You

"You are a cripple, what can you teach me?" Chen Wu used his deformed left hand to draw a singular value decomposition on the paper, nonchalantly responding to Song Qingyao's humiliation. "There are many, such as how to find a non-zero solution space in incomplete ranks." "Don't come tomorrow!" The glass bottle shattered on the ground, and the scent of mint filled the air. "See you tomorrow." He wiped away the shards of glass the wheelchair had run over. "Chen Wu, you smell so disgusting!" His hand that was adjusting the angle of the wheelchair paused, and he replied to her lightly, "Yeah, I know." He unscrewed the deodorant with one hand, and the citrus-scented moonlight flooded in, covering up all the secret and unpleasant smells. The setting sun slanted into the study, and the wet formulas on the draft paper shimmered with light. "... I'm sorry." Her voice was so soft that it was almost inaudible, and her fingers dug at the corners of the table unconsciously. Chen Wu's right hand was hanging in the air, his knuckles twitching slightly due to spasm. The sunlight passed through his fingers, casting shaky shadows on the top of her hair. One second, two seconds, three seconds, five seconds! The hand covered with pinholes gently landed on the top of her head, and rubbed her newly washed hair very slowly and steadily. "You figured it out? You're smarter than I thought." She finally took hold of his mutilated palm, and her fingertips traced the knuckles twisted by spasms. "Chen Wu..." Her voice was softer than when she solved the characteristic value, "I finally understand..." ‖X→ - c→‖? ≤ ε "When the vector x enters Chen Wu's ε neighborhood..." Her fingers crossed his spasming knuckles, "it will always converge." His incomplete left hand clasped her wrist and added the proof behind the inequality: ∵ Song Qingyao∈N(c→,ε) ∴ Eδ>0 s. T. When the heartbeat frequency ‖f‖> δ System stability is defined by you The night breeze lifted the curtains, and the moonlight shone on the calculation paper stained by medicine stains. Please ask Mr. Song to verify: Is it possible that Song Qingyao can be part of Chen Wu's future solutions? Song Qingyao wrote on the calculation paper without hesitation: If and only if Song Qingyao∈Chen Wu There is a unique optimal solution that makes "happiness"2 reach the global maximum. Concept: When mathematical formulas meet sincerity, even the most precise calculations will go wrong!