Есть ли такая архитектура?

O

OwDafuq

Сейчас используется луковичная архитектура: UI, Application, Infrastructure, Domain слои.

Но, т.к. в дальнейшем изменяться схема доступа к данным не будет от слова совсем (используется MS SQL уже ни один десяток лет и уходить от него никуда не планируется вообще), то уже нет смысла ни в UnitOfWork, ни в Repository. То есть можно избавиться от Infrastructure слоя, чтобы схема была уже такая: UI, Application, Domain.

Но в данном случае слой Application уже не будет так называться? Да и вообще, нормальная ли это практика? Просто в случае с UnitOfWork и Repository накладывают только лишнюю нагрузку, потому что это и так реализовано в EntityFramework.

Похожих примером в гугле на нашел, либо всё делают в 1 проекте, либо уже по луковичной с выделением отдельного слоя доступа к БД.

Есть ли вообще такая архитектура? Если да, то как она называется?
 

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Differential equations analoge of fundamental theorem of symmetric functions

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vivo V40e specs and render surface online ahead of launch​

gsmarena_000.jpg


Ro 14 September 2024


Vivo is getting ready to launch a new member of its V40 family, the vivo V40e. But even though the name suggests it's a lower-tier phone in its respective lineup, the leaked specs online suggest it shouldn't be overlooked.

gsmarena_000.jpg

The render shows part of the device's design and one of the color options likely called Royal Bronze. It's also clear that the display will be curved and the back design will be largely similar to its siblings.

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When an algebra isomorphism preserves positive involution

Let $A$ be a $K$-algebra where $K$ is a field with a unique ordering. We say a $K$-linear involution $*$ is positive if the map $A \to K$ via $a \mapsto tr(a^*a)$ is positive definite with respect to the ordering. Here, $tr(a)$ is the trace of the left multiplication map $a:x \mapsto ax$.

Suppose there is a $K$-algebra isomorphism $$\varphi: A \to B.$$

If there is a unique (up to isomorphism) positive involution in $A$ and $B$, can we say the involution must be preserved by the isomorphism $\varphi$: $$\varphi: (A, *_A) \to (B, *_B)?$$

Motivation:​


My question is motivated from representation theory. When $W$ is a real irreducible representation (irrep) of a finite group $G$, then $D:=End_G(W)$ is a division algebra by Schur's lemma. Additionally, Frobenius theorem on real associative division algebras implies that $D$ is isomorphic to either the reals $\mathbb{R}$, complexes $\mathbb{C}$, or quaternions $\mathbb{H}$. Let's call this isomorphism $\varphi$.

Suppose $W$ is endowed with an $G$-invariant inner product (i.e. $\langle g\cdot u, g\cdot v \rangle=\langle u , v \rangle$ for all $u,v \in W$ and $g \in G$). So, $W$ is an orthogonal irrep, and $D$ has the involution that acts as the adjoint corresponding to the $G$-invariant inner product. We know that $\mathbb{R}$, $\mathbb{C}$, and $\mathbb{H}$ all have involution. Furthermore, they are normed division algebras. The involution is the trivial map in $\mathbb{R}$, complex conjugate in $\mathbb{C}$, and the standard involution in $\mathbb{H}$ $\left((a+ib+jc+dk)^*=a-ib-jc-dk\right).$ We even do not need to define the involution in $\mathbb{R}$, $\mathbb{C}$, and $\mathbb{H}$ because the involution must be positive when we want to correspond involution to adjoint and there is a unique positive involution up to isomorphism in real central division algebras. My original question is how to prove that $\varphi$ preserves involution. Is this even true?

problem with armature after mirroring part of object

first of all, I'm totally new to blender, but couldn't find my answer after searching a lot. here is my problem in blender 4.2: in object edit mode, I've duplicated left shoulder top armor, mirrored, moved over right shoulder.

copied image

now the problem is; in pose mode if i rotate or modify left shoulder bone, that right mirrored armor part is moving too as in image:

bone rotate

I've tried to separate all object parts, then clear all parents from it, re-assign right shoulder bone as parent. but still it move with left shoulder bone as well as right shoulder bone.

any help appreciated.

blender file:

ps: is there anyway to select a bone and see which objects assigned to that bone? I know about weights and vertex groups, but in this object, non assigned to mirrored object.
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