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What is Adherent point in Real Analysis ?
Definition. Let S be a subset of ℝ . A point x ∈ ℝ is said to be an adherent point of S if every neighbourhood of x contains a point of S. It…
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Principle of induction
Let S be a subset of ℕ such that (i) 1 ∈ S, and (ii) if k ∈ S then k +1 ∈ S. Then S = ℕ . Proof. Let T= ℕ - S. We prove that T= Φ. Let …
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Show that 0 is a characteristic root of matrix A if and only if A is singular
source: adobe stock Solution: Let 0 be the characteristic equation of matrix A. Then implies ⌈A-ΥI⌋=0 Hence | A |=0 is singular. Converse…
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