30-10-2024 - Education - Geometry - Matrix Operations [EN]-[IT]

in Italy2 months ago

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~~~ La versione in italiano inizia subito dopo la versione in inglese ~~~


[ENGLISH]
30-10-2024 - Education - Geometry - Matrix Operations [EN]-[IT]
With this post I would like to provide some brief notions about the technical topic mentioned in the subject.
The context in which we operate is that of analytical geometry
(code notes: MOD-87)

Matrix Operations
In this article I show an operation performed between matrices.

Matrix Sum
Let's take as an example the matrix B and the matrix C shown below.

image.png

let's now see how to perform a sum between matrices.

image.png

since the matrices are both formed by three rows and 2 columns, therefore they are 3x2 matrices, we can add each element to each other, that is, the element 1,1 of matrix B with its counterpart of matrix C.

Below is a scheme of what I have just described.
In the first case we will have that the sum will be between 2+1, then between 3+0 and so on.

image.png

let's add each element of the first row and the first column of each matrix
Continuing to the last elements of the matrices we will obtain the sum matrix B+C

image.png

Conclusions
A matrix is ​​an ordered table of numbers arranged in rows and columns, and represents a function that maps points from one space (or coordinate system) to another.

Question
Have you ever tried to add two matrices?


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[ITALIAN]
30-10-2024 - Education - Geometria - Operazione con le matrici [EN]-[IT]
Con questo post vorrei fornire alcune brevi nozioni a riguardo dell’argomento tecnico citato in oggetto.
Il contesto in cui operiamo è quello della geometria analitica
(code notes: MOD-87)

Operazione con le matrici
In questo articolo mostro un'operazione effettuata tra matrici.

Somma tra matrici
Prendiamo come esempio la matrice B e la matrice C mostrate qui di seguito.

image.png

vediamo ora come si effettua una somma tra matrici.

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siccome le matrici sono entrambe formate da tra righe e 2 colonne, quindi sono matrici 3x2, possiamo sommare ciascun elemento l'uno con l'altro, cioè l'elemento 1,1 della matrice B con il suo corrispettivo della matrice C.

Qui di seguito uno schema di quello che ho descritto appena adesso.
Nel prima caso avremo che la somma sarà tra 2+1, poi tra 3+0 e così via.

image.png

sommiamo ciascun elemento della prima riga e della prima colonna di ogni matrice
Proseguendo fino agli ultimi elementi delle matrici otterremo la matrice somma B+C

image.png

Conclusioni
Una matrice è una tabella ordinata di numeri disposti in righe e colonne, e rappresenta una funzione che mappa punti da uno spazio (o sistema di coordinate) a un altro.

Domanda
Avete mai provato a fare la somma tra due matrici?

THE END

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 2 months ago 

Ciao Felipe, ti ho rispoto direttamente nel post

 2 months ago 

At university, I remember that this topic was not easy for me, luckily it is not too relevant in my current work.

Exactly!!! You hit the nail on the head. At some point matrix operations become complicated and are usually of little use in most day-to-day work.

Wow very detailed and self explained. I love how you actually took your time to explain this in detail. This makes me to remember years ago when I was learning matrix in mathematics, it was kind of at first frustrating

Some professors do not understand that matrices are an unusual thing in everyone's life. Explaining the operations between them very well is important, but I notice that many cannot explain matrices well either with words or with examples.

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