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Lubin

Minnesota

math.brown.edu/~lubinj

Age: 76

Aged mathematician

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Top Questions
Top Answers
48
Prove that $i^i$ is a real number
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24
Critiques on proof showing $\sqrt{12}$ is irrational.
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17
Is $\mathbb Q_r$ algebraically isomorphic to $\mathbb Q_s$ while r and s denote different primes?
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15
Who first called the Grothendieck's schéma scheme?
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13
“Negative” versus “Minus”
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12
A Question about Doctoral Theses in Mathematics
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10
Lemma vs. Theorem
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9
Galois group of a degree 8 polynomial
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8
A Finite Field of Order $125$ has a Subfield of order $25$?
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8
Can a ring of positive characteristic have infinite number of elements?
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7
How popular and used were logarithm tables?
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7
Can $a, b\in H\Rightarrow (ba)^{-1}\in H$ be a subgroup test?
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6
Finding zeros and poles of rational functions over elliptic curve
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6
Finding quadratic extensions in $\mathbb{Q}\left(\sqrt{i+2}\right)$
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6
Elements in $\hat{\mathbb{Z}}$, the profinite completion of the integers
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6
Can an event be possible if its probability is zero?
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6
$\phi$ in $O_K$ but not in $\mathbb{Z}[t]$
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5
Calculating Solid angle for a sphere in space
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5
Is there a geometric interpretation of $F_p,\ F_{p^n}$ and $\overline{F_p}?$
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5
Newton polygons
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5
The finite field of $9$ elements - $GF( 3^2)$
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5
“Any one of” or “either”?
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5
How can I get sequence $4,4,2,4,4,2,4,4,2\ldots$ into equation?
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5
Determine the number of solutions of the equation $n^m = m^n$
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5
What is the coefficient of the $x^3$ term in the expansion of $(x^2+x-5)^7$ (See details)?
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5
Find all values of $c$ such that there exists a line that intersects the graph of $f(x) =x^4+9x^3+cx^2+9x+4$ in four distinct points.
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5
Show $x^6 + 1.5x^5 + 3x - 4.5$ is irreducible in $\mathbb Q[x]$.
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