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Just a guy living his dream of becoming a Mathematician. I get obsessed very easily so ve careful with the problems you ask =P. I love women, math, poetry music and football in that order.
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Questions Asked
No-data:
Group Title
1. How many distinct binary relations can be constructed from a given set A with cardinality 3 to a given set B with cardinality 4?
…
updated one year ago
6 replies
No Medals Yet
Mathematics
No-data:
Group Title
Why \[\forall x \in \emptyset: P(x)\] is equivalent to \[x\in \emptyset \Rightarrow P(x)\]?
updated one year ago
2 replies
4 Medals
Mathematics
No-data:
Group Title
Can someone explain this in plain english, or spanish:
\[\forall x \in \emptyset : P(x)\] is TRUE regardless of the value of P(x)
updated one year ago
22 replies
2 Medals
Mathematics
No-data:
Group Title
I was enumerating the elements of the power set of this set S:= {1,2,3,4,5} and I thought that the number of these elements could be obtaine…
updated one year ago
7 replies
2 Medals
Mathematics
No-data:
Group Title
Let the set T be \(T:=\{1,2,\{1,2\}\}\). Is this true:
\[T-\wp T=\wp T - T\]
updated one year ago
9 replies
2 Medals
Mathematics
No-data:
Group Title
Given the following set \(S:=\{1,2,3,4,5\}\) evaluate the following expression:
\[\wp S - S\]
updated one year ago
138 replies
4 Medals
Mathematics
No-data:
Group Title
Cardinality properties:
Suppose you have three sets A, B, and C, satisfying the following conditions:
\( \# (A\cap B)=11 \)…
updated one year ago
19 replies
1 Medal
Mathematics
No-data:
Group Title
Can be proved that \(\emptyset \) is a subset of every set?
updated one year ago
1 reply
4 Medals
Mathematics
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Group Title
I'm not sure about this expression:\[\emptyset \subset \{\emptyset\}\], I think it's false.
updated one year ago
7 replies
1 Medal
Mathematics
No-data:
Group Title
Is this true or false?
\[\emptyset \subset \emptyset \]
updated one year ago
8 replies
4 Medals
Mathematics
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Group Title
How can I write an inline equation?
updated one year ago
4 replies
4 Medals
Mathematics
No-data:
Group Title
Help me to check my anwers please. Suppose the following set is given \(A:= {1,2,3,4,5}\) Which of the following expressions are TRUE?
updated one year ago
No Medals Yet
Mathematics
No-data:
Group Title
How can I simplify this: \[\left(P\wedge\neg R\right)\vee\left(P\wedge\neg Q\right)\vee\left(Q\wedge\neg R\right)\]
updated one year ago
73 replies
5 Medals
Mathematics
No-data:
Group Title
How can I simplify this: \[\left(P\wedge\neg R\right)\vee\left(P\wedge\neg Q\right)\vee\left(Q\wedge\neg R\right)\]
updated one year ago
No Medals Yet
Mathematics
No-data:
Group Title
Why the Navier-Stokes equations are so difficult to solve?
updated one year ago
3 replies
1 Medal
Mathematics
No-data:
Group Title
Why is the sky red during the sunset?
updated one year ago
4 replies
1 Medal
Mathematics
No-data:
Group Title
Hi!
There is an algorithm called the sieve of erastothenes to find a list of prime numbers on a list from 2 to n. I found an implementation…
updated 2 years ago
7 replies
2 Medals
Mathematics
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Group Title
The method parseInt(String s) of the java class Integer returns and static int. I don't quite understand the static part. Could someone help…
updated 2 years ago
2 replies
1 Medal
Mathematics
No-data:
Group Title
Hi, I'm having troubles understanding the "this" keyword in Java. I already googled it and red the Java tutorial on that plus some other web…
updated 2 years ago
8 replies
2 Medals
Mathematics
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Group Title
In a survey of 500 people, 200 indicated that they would be buying a major appliance within the next month. 150 indicated that they would bu…
updated 2 years ago
1 reply
1 Medal
Mathematics
No-data:
Group Title
In a survey of 500 people, 200 indicated that they would be buying a major appliance within the next month. 150 indicated that they would bu…
updated 2 years ago
15 replies
1 Medal
Mathematics
No-data:
Group Title
What is the rule to get this list of ordered pairs :
(0,0),(1,1),(2,1),(3,2),(4,2),(5,3),(6,3),...
updated 2 years ago
25 replies
3 Medals
Mathematics
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Group Title
I'm having problems with the problem 4a. I would appreciate some guidance. This is what I have until now.
updated 2 years ago
4 replies
No Medals Yet
Mathematics
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Group Title
I started to learn SQL and I see that the JOIN operations resembles the set operations, can be a table thought as a SET?.
updated 2 years ago
1 reply
No Medals Yet
Mathematics
No-data:
Group Title
Why does this fields have a transitive functional dependency.?
updated 2 years ago
10 replies
3 Medals
Mathematics
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Group Title
What is the difference between a clause and a statement in SQL?
updated 2 years ago
2 replies
2 Medals
Mathematics
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Group Title
Why is it important to learn relational algebra?
updated 2 years ago
9 replies
3 Medals
Mathematics
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Group Title
How values can I have if I have 4 bytes?
updated 2 years ago
1 reply
4 Medals
Mathematics
No-data:
Group Title
I would appreciate some help with this proof:
Let \[CD\perp AB, FD > DE\], prove that \[CF>CE\]
updated 2 years ago
22 replies
3 Medals
Mathematics
No-data:
Group Title
Is there a way of deleting an answer to a question I posted? I apreciate the user who post it. But I think It doesn't help at all, actually …
updated 2 years ago
8 replies
3 Medals
Mathematics
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