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15
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Is there an expression for $i, j, k \in \left\{1,\, 2,\, 3\right\}$ with $i \neq j \neq k$?

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#index-notation #kronecker-delta
58
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What is a varible produced through binary dimension reduction called?

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#functions #notation #index-notation
46
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How to deal with products of “shifted” Kronecker deltas?

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#linear-algebra #differential-geometry #notation #tensors #index-notation
228
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How can I prove that the differential operator with respect to covariant coordinates behaves contravariantly?

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#partial-derivative #tensors #jacobian #index-notation #curvilinear-coordinates
65
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Is the author messing up the notation or am I thick?

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#tensors #index-notation
2.2k
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Proof for the Laplacian of scalar fields using index notation

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#multivariable-calculus #partial-differential-equations #laplacian #index-notation #scalar-fields
30
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Sum of 4 first index $\sum_{n=1}^4a_i=1$

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#calculus #index-notation
35
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The set of all the summands/factors in a sum/product

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#elementary-set-theory #notation #index-notation
241
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What is the correct way to denote empty n-ary intersection of sets?

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#elementary-set-theory #index-notation
225
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Large Vector Notation

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#notation #vectors #index-notation
109
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How to write an "index set"

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#sequences-and-series #summation #integers #quotient-spaces #index-notation
59
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Index notation in question about distribuitivity of tensor product over direct sum

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#notation #tensor-products #direct-sum #index-notation
78
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How do you call this system?

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#ordinary-differential-equations #dynamical-systems #physics #index-notation #biology
49
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Meaning of summation from + to - index

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#notation #index-notation
212
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Proof for a multi-index inequality?

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#real-analysis #number-theory #inequality #index-notation #majorization

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