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1d
comment Existence of a block upper triangular form matrix representation for a linear operator
@OliverJones no, orthogonality of the basis does not force $B_2$ to be $T$-invariant. I've added a concrete counterexample.
1d
revised Existence of a block upper triangular form matrix representation for a linear operator
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1d
comment Existence of a block upper triangular form matrix representation for a linear operator
@OliverJones Why do you think so?
1d
comment Existence of a block upper triangular form matrix representation for a linear operator
@OliverJones Why do you think so? Consider how $T$ acts on an arbitrary element $v$ not in $W$. Why do you think $Tv$ remains orthogonal to $W$?
1d
comment Is it accurate to say that multiplication of two integers yields an integer?
@KevinCarlson Confusion about whether the product of two integers is an integer is precisely confusion about how, exactly, the integers are defined. Once cannot ask the former question if one understands the latter!
1d
revised Is it accurate to say that multiplication of two integers yields an integer?
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1d
answered Existence of a block upper triangular form matrix representation for a linear operator
1d
answered Is it accurate to say that multiplication of two integers yields an integer?
Feb
6
comment Why does $\bar A = \left\{ {{P_\Delta }(\lambda ):\left\| {{\Delta _j}} \right\| \le \varepsilon ,j = 0,1,2…m} \right\}$?
Please explain all of your notation. What is the relationship between $A$ and $A_i$? What is $\bar{A}$?
Feb
1
comment Material Derivative of the Gradient of a Scalar Field
@NathanielWerner by $\nabla^2$ I mean the gradient of the gradient, not the Laplacian. I've replaced with $\nabla \nabla$ in case that's clearer.
Feb
1
revised Material Derivative of the Gradient of a Scalar Field
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Feb
1
revised Material Derivative of the Gradient of a Scalar Field
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Feb
1
revised Material Derivative of the Gradient of a Scalar Field
added 6 characters in body; edited tags
Feb
1
revised Material Derivative of the Gradient of a Scalar Field
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Feb
1
answered Material Derivative of the Gradient of a Scalar Field
Feb
1
revised Mathematical usage of “$\dots$” during enumeration, is it ok to be imprecise?
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Feb
1
answered Mathematical usage of “$\dots$” during enumeration, is it ok to be imprecise?
Jan
31
answered Representation of Jordan block for exponent matrix
Jan
28
accepted Biharmonic equation boundary conditions
Jan
27
comment when can a surface conformally equivalent to the sphere be isometrically immersed?
Thanks @JohnMa, yes it seems the difficult/"interesting" case is when the resulting metric has regions of negative curvature