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Questions Asked

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/931921/findtheparticularsolutionofux2uy4uexysatisfyingthefollowings
 updated 18 hours ago
 29 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/930314/findasolutiongxthatsatisfiesthepdeux3uyu1
 updated 2 days ago
 7 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
find some constants $a$ and $b$ (not both zero), such that $u(x,y)=f(ax+by)$ is a generic solution, where $f$ is an arbitrary $C^1$ function…
 updated 3 days ago
 44 replies
 2 Medals
Mathematics

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/927336/usingseparationofvariablestosolveutt16uxxuxt
 updated 6 days ago
 12 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
suppose I want to multiply 2 x 5 in base 2. I know how to create the table but then I am stuck. I know 2 x 5 = 10 but that's base 10. I don'…
 updated 7 days ago
 58 replies
 3 Medals
Mathematics

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/923137/findasolutiontolaplacesequationthatsatisfiespolarcoordinatesandshow
 updated 9 days ago
 110 replies
 1 Medal
Mathematics

UsukiDoll:
Group Title
Finding solutions that would satisfy the wave equation and Laplace equation ...pdes
see attachments
 updated 11 days ago
 14 replies
 1 Medal
Mathematics

UsukiDoll:
Group Title
pde example problem
 updated 13 days ago
 22 replies
 3 Medals
Mathematics

UsukiDoll:
Group Title
What is the least number of weights required to weight any integral number of pounds up to 63 pounds if one is allowed to put weights in onl…
 updated 17 days ago
 84 replies
 2 Medals
Mathematics

UsukiDoll:
Group Title
number theory proof problem regarding Euclid's Division Lemma
 updated 17 days ago
 107 replies
 4 Medals
Mathematics

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/864114/findasolutiontoalinearsystemusingthedoperatorandmethodofeliminatio
 updated 2 months ago
 53 replies
 2 Medals
Mathematics

UsukiDoll:
Group Title
constant coefficient problem
y'''2y''y'+2y = 0
 updated 4 months ago
 10 replies
 2 Medals
Mathematics

UsukiDoll:
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separable equation 1/x dx + dy = 0
 updated 4 months ago
 11 replies
 1 Medal
Mathematics

UsukiDoll:
Group Title
dy/dx = x+1 / y separable equation
 updated 4 months ago
 9 replies
 3 Medals
Mathematics

UsukiDoll:
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another separable equation
xdx+ydy = 0
 updated 4 months ago
 15 replies
 4 Medals
Mathematics

UsukiDoll:
Group Title
separable equation see drawing
 updated 4 months ago
 29 replies
 3 Medals
Mathematics

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/751410/provefinftyainftyrightarrowbinftyisabijection
 updated 4 months ago
 50 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/776815/letaabcfgibbfhandcaklmshowthatbackslashis
 updated 4 months ago
 2 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
Cauchy sequence... I need to prove 03 and 04.
 updated 4 months ago
 55 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/767117/letabinrwhereabprovethatthereexistarationalnumbercand/767138?noredirect=1#767…
 updated 4 months ago
 88 replies
 5 Medals
Mathematics

UsukiDoll:
Group Title
http://math.stackexchange.com/questions/766935/provethatifyzinqthenyzina
 updated 4 months ago
 34 replies
 1 Medal
Mathematics

UsukiDoll:
Group Title
prove that gcd(a,m) = 1 and gcd(b,m) = 1 if and only if gcd(ab,m) = 1
Just If gcd(ab,m) = 1, then gcd(a,m) = 1 and gcd(b,m) = 1 only
 updated 5 months ago
 12 replies
 2 Medals
Mathematics

UsukiDoll:
Group Title
@satellite73 need your help figuring this out.... going to type in details in the comments
 updated 5 months ago
 25 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
@satellite73 need help with something link in comments
 updated 5 months ago
 45 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
Let \(R\) be a reflexive and transitive relation on a set \(S\). Let \(R^*\) be the dual relation, \((a,b) \in R^*\) if and only if \((b,a) …
 updated 5 months ago
 62 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
Question: A number is said to be algebraic if it is the root (zero) of a polynomial with integer coefficients. Show that the set of algebrai…
 updated 5 months ago
 87 replies
 3 Medals
Mathematics

UsukiDoll:
Group Title
Define a product of pairs setting \((a,b) \cdot (c,d) = (ac+bd,ad+bc)\) . Show that this operation is well defined for equivalence classes.
 updated 5 months ago
 50 replies
 No Medals Yet
Mathematics

UsukiDoll:
Group Title
Refine the relation on a strict poset that is not maximal
…
 updated 6 months ago
 13 replies
 1 Medal
Mathematics

UsukiDoll:
Group Title
I need to create a poset and subset diagram for S_2 [1 2 3 5 6 7 10 14 15 21 30 35 42 70 105 210]. I've tried starting from the middle and …
 updated 6 months ago
 123 replies
 1 Medal
Mathematics

UsukiDoll:
Group Title
what is wrong with this proof?
 updated 6 months ago
 8 replies
 1 Medal
Mathematics
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