4. a. Define the following Terms giving one example each:i. Partial Ordering Relationsii. Equivalence relationsb. Answer these questions for the partial order represented by the following Hassediagram.uFind the maximal elements.ii. Find the minimal elements.iii. Is theiv. Is there a least element?i.a greatest element?v. Find all upper bounds of {m, k, s}.vi. Find all lower bounds of {c, d, t}.vii. Find the greatest lower bound of fu, k, m} if it exists.viii.Find the least upper bound of {b, k, t} if it exists.

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4. a. Define the following Terms giving one example each: i. Partial Ordering Relations ii. Equivalence relations

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Author:Erwin Kreyszig

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Chapter2: Second-order Linear Odes

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