Does anyone here know Prolog? I'm using the SWI-Prolog interpreter.
Given this list: [[1, 2], [2, 3], [3, 4]] how do you make it say Yes if 2 (of the first list) = 2 (of second list) and 3 (of second list) = 3 (of third list)? I'm having trouble visualizing this fact as the elements in the...
Does anyone know how I would go about displaying/generating webpage content with info from an array in a .java file?
Suppose you click on cars.com, once you do, the webpage will display the contents (say car names) of an array from a .java file. How do I do this?
Thanks.
I have a question regarding about CFGs, derivations, and ambiguity.
Say you are given some CFG that produces A, B, or C
You are able to come up with two different derivations for A
To say the CFG that produces A, B, or C is ambiguous, you must find two different parse trees for some...
I have to write an XQuery that for example, "returns a list of books for a given author".
The "given author" in this case can be anything. Therefore, I was wondering what do I need to add to give the query someting, which in return, it will process it.
For example,
for $x in...
Homework Statement
F = {S -> NOPQZVWX, NX -> UV, NXT -> RY, YQ -> NXR, QZ -> S, PQ -> S}
Find the minimum closure of F.
Homework Equations
none
The Attempt at a Solution
So far I have made RHS of each FD into a single attribute and then I eliminated redundant attributes from...
Thanks, that worked, but what do you need to add if there are duplicate entires in Table 1?
ie.
Table 1
A B
1 4
1 4
2 5
3 6
Using the latest query you wrote, I get the resulting table:
Table 1
A B C
1 4 6
2 5
3 6
One of the same 1 4 entry is removed. I tried taking out the...
Thanks for the reply. I just gave that a try and it did the following:
Result
A B C
1 4
2 5
3 6
1 4 6
I'm using PSQL PostgresSQL to do this stuff. Should it be the same with your tsql code? Because I get the table above when doing your example.
I'm having trouble getting the following work. Can anyone help me?
I have two tables that look like the following:
Table 1 Table 2
A B A B C
1 4 1 4 6
2 5
3 6
How do I join both of them such...
Hi,
I am a bit confused here. Just say you're given code and it says to show the best-case analysis and the worst-case analysis. When you show the best-case, what should the answer be in? In big-O or big-omega? Similarly, if you show the worst-case, what should the answer be in? big-O or...
Does anyone here know how to prove this? I'm stuck on how to even get this started.
Let G be a connected, weighted and undirected graph where all edges have a weight of 1.
Prove that if Dijkstra's algorithm is run on this graph, G, then the tree returned is a breadth-first tree.
Can anyone help me with this question? I tried taking the derivative of u with respect to x and then summed the third derivative, but I'm getting nowhere. Any help would be great, thanks.
Let u(x1, x2, … , xn) = http://img480.imageshack.us/img480/1694/image0027hm.gif [Broken],[/URL] where a...
Hmm, I couldn't really think of an algebraic way of capturing that, but what I did was find the derivative of f and g. Then I solved for g'(n) - f'(n) = 0 and got n = 133.3 and -0.12. However, I do not know how to better show that f is less than c * g(n) for n >= 210.
btw, I solved the |f -...
I have two questions here.
I must prove that f(n) = 100n^2 + 5n + 10 is in big-O of g(n) = n^3 - 100n^2
I already found a constant c and an n that satisfies the condition such that f(n) \leq c * g(n). Let c = 1 and n = 201.
However, I am stuck on showing/manipulating the algebra that this is...
Q: Show that every bounded set in R has a least upper bound. Using either
"Every monotonic and bounded sequence is convergent" or
"Every bounded sequence has an accumulation point" or
"Every bounded sequence has a convergent subsequence"
I'm not really sure how to start this out, but would...
I am having difficulty in converting 29 and 0.7 to IEEE single precision floating point.
For 29,
I represent 29 as a product of a power of 2 using 58/4 * 21.
However, I am having trouble getting the mantissa value because 58/4 is 14.5, and I need something in the format of 1.[numbers]. Any...
Yup, that's what I got after the substitution and working. Sorry for replying so late. I finally had a chance to do this question just now.
\int \frac{16}{(4 + x^2)^2} \ dx = \frac{32sec^{2}\Theta}{(4 + 4tan^{2}\Theta)^2} d theta
where x = 2tan\Theta
\ dx = 2 sec^{2}\Theta d theta...
Q: When a binary number is incremented by 1, there may be a carry that may carry over several bit positions i.e. 1010111 is incremented and the carry distance is 3. Given a natural number n, find the average carry distance when incrementing a binary number b in the inverval 2n <=b <= 2n+1...
Thanks. However, can you spot my mistake when solving for the antiderivative of (4/ (4 + x2)2)? I must be doing something wrong, but I can't find what
(4/ (4 + x2)2)
Let x = 2 tan theta
dx = 2 sec2theta dtheta
= (8 sec2theta / ((4 + 4tan2theta)2)
factor out a 2
= 4 + 4 tan2 theta...
Hmm, any hint on what the clever algebra should be? I can't really figure it out from here. I have simplified the equation down to
4x2 / (4 + x2)2 dx
using x = u2
Thanks. btw, how did you plot those graphs in graphmatica?
edit - I also realized I made a typo with the equation. It's suppose to be r = 3 + sin q and not r = 3 sin q.
Determine the maximum and minimum values of the curvature at points of the polar curve r = 3 + sin q.
I know that the polar curve, r = 3 + sin q is sort of similar to an upside down heart when graphed. However, I am not sure what to do when finding the maximum and minimum values of the...
How would you guys come about getting the antiderivative for the following function?
8u^5 / ((4 + u^4)^2)
I tried rearranging the equation like the following:
8u^5 * ((4 + u^4)^(-2)), but it's not really getting me anywhere. I tried to do a u substitution, but can't find one where it...
Hi,
Just say you are given a 3x3 matrix with a value k in it. What would be the best way to find out if it is diagonalizable or not for certain values of k? The matrix in question is
-1 0 0
k 1 0
-2 1 -1
Hmm, so is this the correct method of doing it?
det(A + B^T) = det(A^T + B)
det(A + B^T)^T = det(A^T + B)^T
det(A^T + B) = det(A + B^T)
I can't do this, correct? Thanks for the hints though.
Thanks for the responses, so is this correc then? I tried it, but I am stuck.
Q: If A and B are n x n matrices, AB = -BA, and n is odd, show that either A or B has no inverse.
det(AB) = det(-BA)
detA detB = det(-B) detA
detA detB = (-1)^n detB detA
1 = -(1)^n
Is this correct...
Can anyone help me start this out? I got absolutely no clue.
Q: If A and B are n x n matrices, AB = -BA, and n is odd, show that either A or B has no inverse.
I know that we have to show that either det A is 0 or det B is 0, but I have no clue how to show it with the given information...
Q: In each case, show that T is not a linear transformation.
T[x y]^T = [0 y^2]^T
A: If X = [0 1]^T then T(2X) = [0 4]^T while 2T(X) = [0 2]^T
I don't quite understand this solution. What are we trying to accomplish here? So, since T(2X) = [0 4]^T while 2T(X) = [0 2]^T do not yeild...
To make my question more clear, in the following example, how come x + 5y becomes x - 5y? The question basically says to let T be the transformation induced by an invertible 2x2 matrix A. In each case, interpret T^-1 geometrically. For this question,
A = 1 5
0 1...
Hi,
Is there a formula to do this? The textbook just says to "reverse" the action of T to get T^-1 (T inverse). Can someone explain to me in laymen terms, how to accomplish this? For example,
For T = [2x y]^T is T^-1 = [-2x y]^T?