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Recent activity by Sovan Pal
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GATE CSE 2022 | Question: 15
Consider the following three relations in a relational database. $\text{Employee} (\underline{\text{eId}},\text{Name}), \; \text{Brand}(\underline{\text{bId}},\text{bName}), \; \text{Own}(\underline{\text{eId}},\underline{\text{bId}})$ Which of the following relational ... $ \Pi_{eId} \left( (\Pi_{eId}(Own) \times \Pi_{bId} (Own)) / \Pi_{bId} (Brand) \right)$
Consider the following three relations in a relational database.$\text{Employee} (\underline{\text{eId}},\text{Name}), \; \text{Brand}(\underline{\text{bId}},\text{bName}...
8.6k
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commented
Sep 30, 2022
Databases
gatecse-2022
databases
relational-algebra
multiple-selects
1-mark
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–
2
answers
2
Maths: Group Theory
Que: Which one of the following is not true? a) In a group (G,*), if a*a = a, then a=e, where e is an identity element. b) In a group (G,*), if x-1 = x, ∀x ∈ G, then G is an Abelian group. c) In a group (G,*), if (a*b)2 = (a2*b2) then G is an Abelian group. ... (G,*), if (a*b)n = (an*bn) then G is an Abelian group, where n={2, 3, 4, ......} PS: c) and d) seem correct to me.
Que: Which one of the following is not true?a) In a group (G,*), if a*a = a, then a=e, where e is an identity element.b) In a group (G,*), if x-1 = x, ∀x ∈ G, then G...
3.4k
views
commented
Jul 21, 2020
Set Theory & Algebra
discrete-mathematics
group-theory
abelian-group
set-theory&algebra
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–
2
answers
3
Group theory
Let (G,*) be a group such that O(G) = 8, where O(G) denotes the order of the group. Which of the following is True ? There exist no element a in G whose order is 6. There exist an element a in G whose order is 4. There exist more then one element in G whose order is 1 None of these
Let (G,*) be a group such that O(G) = 8, where O(G) denotes the order of the group. Which of the following is True ?There exist no element a in G whose order is 6.There e...
3.1k
views
answered
Jul 21, 2020
Set Theory & Algebra
group-theory
discrete-mathematics
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