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6h
asked matrix multiplication manipulation
Jul
6
accepted How come $Ax\le b$ and $c^Tx\ge \alpha +\epsilon$ has NO nonnegative solution.
Jul
6
revised How come $Ax\le b$ and $c^Tx\ge \alpha +\epsilon$ has NO nonnegative solution.
added 64 characters in body
Jul
6
asked How come $Ax\le b$ and $c^Tx\ge \alpha +\epsilon$ has NO nonnegative solution.
May
30
accepted How to show that the general solution has the form:
May
29
asked How to show that the general solution has the form:
May
23
comment how to show that all solutions tend to zero?
no, i do not know.
May
23
comment how to show that all solutions tend to zero?
true. thanks @Henning Makholm
May
23
comment how to show that all solutions tend to zero?
it looks too long to solve the ode by the link given above. there must be another way to solve the question.
May
23
comment how to show that all solutions tend to zero?
how to solve this type of ode?
May
23
asked how to show that all solutions tend to zero?
May
23
comment Given the differential equation $\frac{dy}{dt}+a(t)y=f(t)$ , show that every solution tends to 0 as t approaches infinity.
Could you please how you applied Grönwall's inequality.
Apr
15
accepted Why do we need two linearly independent solutions for 2nd order linear ODE
Apr
2
comment Why do we need two linearly independent solutions for 2nd order linear ODE
true. I edited my question. thanks.
Apr
2
revised Why do we need two linearly independent solutions for 2nd order linear ODE
deleted 9 characters in body
Apr
2
asked Why do we need two linearly independent solutions for 2nd order linear ODE
Mar
26
asked Why is $[\partial f/\partial x,2\partial f/\partial y,\partial f/\partial x]$ NOT a vector?
Mar
26
asked scalar function's value - choice of coordinates
Jan
3
accepted A=B.C if C is non-singular then col(A)=col(B)
Jan
3
asked A=B.C if C is non-singular then col(A)=col(B)