Question
कोटि दो वाले सहपरिवर्ती और प्रतिपरिवर्ती टेन्सरों को परिभाषित कीजिए। सिद्ध करें कि वेग और त्वरण प्रतिपरिवर्ती सदिश हैं।
Answer :
Word Count : 224
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कोटि दो वाले टेन्सरों को उनके सूचकांक स्थिति के आधार पर दो प्रकार में वर्गीकृत किया जाता है: सहपरिवर्ती (Covariant) और प्रतिपरिवर्ती (Contravariant)। यदि किसी द्विसूचकांक टेन्सर के दोनों सूचकांक नीचे लिखे हों, जैसे (A_{ij}), तो इसे कोटि दो सहपरिवर्ती टेन्सर कहते हैं। यह एक ऐसा टेन्सर
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