Published November 12, 2025
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Denseness of J= {𝐴 + 𝐵𝑇:𝐴,𝐵 ∈ 𝑀𝑘(𝑍)} in the Space of all 𝑘 × 𝑘 real matrices, where T is a fixed 𝑘 × 𝑘 matrix with irrational entries
Description
Several countable minimal dense subsets of R are known to exist. An important example is the set Z+Zq={a+bq: a,b∈Z}, where q is an irrational number.In this paper, we establish an analogous result in the space of matrices 〖 M〗_k (R). We prove that the set
J={A+BT:A,B〖∈M〗_k (Z)} is dense in M_k (R) under the metric on M_k (R) defined by
〖d(X,Y)=‖X-Y‖〗_p= (∑_(1≤i,j≤k)▒|X(i,j)-Y(i,j)|^p )^(1/p)
Where T be a fixed matrix in M_k (R) whose entries are irrational numbers.
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Dates
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2025-11-12Several countable minimal dense subsets of R are known to exist. An important example is the set Z+Zq={a+bq: a,b∈Z}, where q is an irrational number.In this paper, we establish an analogous result in the space of matrices 〖 M〗_k (R). We prove that the set J={A+BT:A,B〖∈M〗_k (Z)} is dense in M_k (R) under the metric on M_k (R) defined by 〖d(X,Y)=‖X-Y‖〗_p= (∑_(1≤i,j≤k)▒|X(i,j)-Y(i,j)|^p )^(1/p) Where T be a fixed matrix in M_k (R) whose entries are irrational numbers.
References
- [1]. Hardy, G. H., and Wright, E. M. An Introduction to the Theory of Numbers. Oxford University Press, 2008. [2]. Niven, I. Irrational Numbers.The Mathematical Association of America, 1956. [3]. Rudin, W. Principles of Mathematical Analysis. McGraw-Hill, 1976.