Problems in Math

I just love mathematica.

数学が大好きだぞう。

[Problems in Math @archive_math]

Happy New Year 2018!! 2018 is not a prime number but it can be written as the sum of squares of 12 successive integers.

I summarized some of the interesting facts about 2018 in my blog.
https://t.co/SSgEZc19Ip

[Problems in Math @archive_math]

@IJTANEJA @juanripu Thank you!! You are right!!

[Problems in Math @archive_math]

最後の式が間違ってました。二乗でなくて2018のままが正しいです。

[Problems in Math @archive_math]

2018年明けましておめでとうございます。今年もよろしくお願いします。2018年は素数年ではありませんが、１２個の連続した整数の二乗���など面白い性質を持ってます。

ブログにちょっとまとめてみました。https://t.co/SSgEZc19Ip

[Problems in Math @archive_math]

メリークリスマス！今日は基礎的な線形代数の問題をたくさんプレゼントしますよー！！

[Problems in Math @archive_math]

My website is now http"s". This means a safer website to enjoy math!!

[Problems in Math @archive_math]

より安全に数学を楽しんで頂けるようにサイトをhttpsにしました。

[Problems in Math @archive_math]

@Chems_security Hi, if a+nZ is in the kernel, then a+mZ=mZ. This implies that a is divisible by m.

So, the kernel consists of elements, mk+nZ, k=0, 1, ...,l-1, where n=ml.

Also, you can prove that the kernel is isomorphic to Z/lZ.

[Problems in Math @archive_math]

Just reached the 600th problem on my blog today!!

https://t.co/rd7t7vMaHy

[Problems in Math @archive_math]

ブログの問題数が６００問目突入しました！！

https://t.co/rd7t7vMaHy

[Problems in Math @archive_math]

【Linear Algebra】Find the determinant of the following matrix.

The solution is given on the blog.
https://t.co/bsPgDHV3OG

[Problems in Math @archive_math]

【線形代数】次の行列の行列式を求めましょう。

答えはブログで
https://t.co/bsPgDHV3OG

[Problems in Math @archive_math]

[482] Find Values of a, b, c such that the Given Matrix is Diagonalizable https://t.co/qnN2ukUSng via @@archive_math

[Problems in Math @archive_math]

[481] Find a Basis of the Vector Space of Polynomials of Degree 2 or Less Among Given Polynomials https://t.co/OfHdUpYPPU via @@archive_math

[Problems in Math @archive_math]

[480] Determine Whether Given Subsets in $\R^4$ are Subspaces or Not https://t.co/WbCYSMvLtq via @@archive_math

[Problems in Math @archive_math]

[479] The Product of Two Nonsingular Matrices is Nonsingular https://t.co/QMili2Ob4f via @@archive_math

[Problems in Math @archive_math]

【Linear Algebra】Find a basis of the null space of the matrix A.

The solution is given on the blog.

https://t.co/LkV1Qs17nz

[Problems in Math @archive_math]

【線形代数】行列Aのカーネル（核）の基底を求めましょう。

答えはブログで。↓

https://t.co/LkV1Qs17nz

[Problems in Math @archive_math]

[478] Find an Orthonormal Basis of the Range of a Linear Transformation https://t.co/rKq6YHLOb6 via @@archive_math

[Problems in Math @archive_math]

[477] Diagonalize a 2 by 2 Matrix if Diagonalizable https://t.co/3EdPASPLVK via @@archive_math