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svd
In linear algebra, the singular value decomposition (SVD) is a factorization of a real or complex matrix. It is the generalization of the eigendecomposition of a positive semidefinite normal matrix (for example, a symmetric matrix with non-negative eigenvalues) to any
m
×
n
{\displaystyle m\times n}
matrix via an extension of the polar decomposition. It has many useful applications in signal processing and statistics.
Formally, the singular value decomposition of an
m
×
n
{\displaystyle m\times n}
real or complex matrix
M
{\displaystyle \mathbf {M} }
is a factorization of the form
U
Σ
V
∗
{\displaystyle \mathbf {U\Sigma V^{*}} }
, where
U
{\displaystyle \mathbf {U} }
is an
m
×
m
{\displaystyle m\times m}
real or complex unitary matrix,
Σ
{\displaystyle \mathbf {\Sigma } }
is an
m
×
n
{\displaystyle m\times n}
rectangular diagonal matrix with non-negative real numbers on the diagonal, and
V
{\displaystyle \mathbf {V} }
is an
n
×
n
{\displaystyle n\times n}
real or complex unitary matrix. The diagonal entries
σ
i
{\displaystyle \sigma _{i}}
of
Σ
{\displaystyle \mathbf {\Sigma } }
are known as the singular values of
M
{\displaystyle \mathbf {M} }
. The columns of
U
{\displaystyle \mathbf {U} }
and the columns of
V
{\displaystyle \mathbf {V} }
are called the left-singular vectors and right-singular vectors of
M
{\displaystyle \mathbf {M} }
, respectively.
The singular value decomposition can be computed using the following observations:
The left-singular vectors of M are a set of orthonormal eigenvectors of MM∗.
The right-singular vectors of M are a set of orthonormal eigenvectors of M∗M.
The non-negative singular values of M (found on the diagonal entries of Σ) are the square roots of the non-negative eigenvalues of both M∗M and MM∗.Applications that employ the SVD include computing the pseudoinverse, least squares fitting of data, multivariable control, matrix approximation, and determining the rank, range, and null space of a matrix.
Vyatskie Polyany Russian VEPR in 7.62×39 with 16″ barrel. Converted to take standard AK magazines with bullet guide installed and muzzle threaded. Includes:
-Flash hider/muzzle brake combo
-SGM slant adapter
-Krebs enhanced selector lever
-Walnut SVD/Tabuk style furniture, shellac finish
-SGM...
I found this website redcolonel.com that sells a variety of (relatively) inexpensive combloc era reproduction scopes, ostensibly made in Belarus.
Has anybody used them before? Is it legitimate?
https://redcolonel.com/posp-4x24-m-sniper-scope-for-ak.html
Another part I bought and never shot. USA mfg. I briefly installed on an AKM which sat in my safe.
$40 includes shipping by USPS in the Pacific Northwest. Or local pickup available M-F 7am-2pm at my shop in Salem near the airport.
VenMo preferred but will accept other electronic options...
****For a local sale I will cut a deal if you buy everything****
I purchased this a few years ago from a shop out in AK, then put it in storage. It has not been fired since it's transfer to me. I bought all the stuff with the intent to make this bad mamma-jamma my go-to DMR, but life got in the...
Hey everyone, looking for an SVD, not a PSL, or anything chinese like the NDM. More so looking for a TIGR or Izmash SVD. 7.62x54R please, i have a VEPR FM 74 which are no longer imported, very clean. Also can trade mags and ammo. Might even throw another gun or something else in if the deal is...
Got cash in hand, not looking to be cheap about it, I know a polymer SVD furniture set isn’t cheap. To be clear this is for a traditional SVD Dragunov. Not interested in anything for the Romanian PSL/FPK
253-441-9744