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## Raja99 why tensor called a second order? one year ago one year ago

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1. malevolence19

A second order tensor is one that transforms like: $M_{ij}=\sum_{\alpha, \beta}a_{i \alpha}a_{j \beta}M_{\alpha \beta}$ if I remember my definitions right.

2. malevolence19

Basically, it transforms with 2 rotation matrices.