DaRT - Ring Property 149

Rings

	Name
	$C^\infty_0(\mathbb R)$: the ring of germs of smooth functions on $\mathbb R$ at $0$
	$k[[x,y]]/(x^2,xy)$
	$k[x;\sigma]/(x^2)$ (Artinian)
	2-dimensional uniserial domain
	Bergman's non-unit-regular subring
	Bergman's primitive finite uniform dimension ring
	Bergman's right-not-left primitive ring
	Bergman's ring with IBN
	Bergman's ring without IBN
	Bergman's unit-regular ring
	Camillo and Nielsen's McCoy ring
	catenary, not universally catenary
	Cohn's right-not-left free ideal ring
	Cohn's Schreier domain that isn't GCD
	Cozzens simple, left principal, right non-Noetherian domain
	Cozzens' simple V-domain
	DVR that is not N-2
	Facchini's torch ring
	Faith-Menal counterexample
	Kaplansky's right-not-left hereditary ring
	Kerr's Goldie ring with non-Goldie matrix ring
	Kolchin's simple V-domain
	Leavitt path algebra of an infinite bouquet of circles
	Left-not-right pseudo-Frobenius ring
	McGovern's commutative Zorn ring that isn't clean
	Michler & Villamayor's right-not-left V ring
	Mori but not Krull domain
	Nagata ring that not quasi-excellent
	Nagata's Noetherian infinite Krull dimension ring
	Nagata's normal ring that is not analytically normal
	Nielsen's semicommutative ring that isn't McCoy
	Noetherian ring that is not Grothendieck and not Nagata
	non-$h$-local domain
	Non-Artinian simple ring
	Nonlocal endomorphism ring of a uniserial module
	ring of germs of holomorphic functions on $\mathbb C^n$, $n>1$
	Samuel's UFD having a non-UFD power series ring
	Simple, Noetherian ring with zero divisors and trivial idempotents
	Simple, non-Artinian, von Neumann regular ring
	Small's right hereditary, not-left semihereditary ring
	Šter's counterexample showing "clean" is not Morita invariant
	$2$-adic integers: $\mathbb Z_2$
	$\mathbb A_\mathbb Q$: the ring of adeles of $\mathbb Q$
	$\mathbb C$: the field of complex numbers
	$\mathbb H$: Hamilton's quaternions
	$\mathbb Q[[X]]$
	$\mathbb Q[[x^2,x^3]]$
	$\mathbb R$: the field of real numbers
	$\mathbb R[[x]]$
	$\mathbb R[x,y,z]/(x^2,y^2, xz,yz,z^2-xy)$
	$\mathbb R[x,y]$ completed $I$-adically with $I=(x^2+y^2-1)$
	$\mathbb R[x,y]/(x^2+y^2-1)$: ring of trigonometric functions
	$\mathbb R[x]/(x^2)$
	$\mathbb R[x_1, x_2,x_3,\ldots]$
	$\prod_{i=0}^\infty \mathbb Q$
	$\prod_{i=1}^\infty \mathbb Q[[X,Y]]$
	$\prod_{i=1}^\infty \mathbb Z/(2^i)$
	$\prod_{i=1}^\infty F_2$
	$\widehat{\mathbb Z}$: the profinite completion of the integers
	$^\ast \mathbb R$: the field of hyperreal numbers
	$C([0,1])$, the ring of continuous real-valued functions on the unit interval
	$C\ell_{2,1}(\mathbb R)$: the geometric algebra of Minkowski 3-space
	$RCFM_\omega(\mathbb Q)$
	$T_\omega(\mathbb Q)$
	10-adic numbers
	2-truncated Witt vectors over $\Bbb F_2((t))$
	Berberian's incompressible Baer ring
	Bergman's exchange ring that isn't clean
	Chase's left-not-right semihereditary ring
	Clark's uniserial ring
	field of $2$-adic numbers
	Full linear ring of a countable dimensional right vector space
	Goodearl's simple self-injective operator algebra
	Goodearl's simple self-injective von Neumann regular ring
	Interval monoid ring
	Left-not-right uniserial domain
	Local right-not-left Kasch ring
	O'Meara's infinite matrix algebra
	Osofsky's Type I ring
	Page's left-not-right FPF ring
	Pseudo-Frobenius, not quasi-Frobenius ring
	Puninski's triangular serial ring
	Ring of holomorphic functions on $\mathbb C$
	Square of a torch ring
	Trivial extension torch ring
	Šter's clean ring with non-clean corner rings
	$\mathbb Q$: the field of rational numbers
	$\mathbb Q(x)$: rational functions over the rational numbers
	$\mathbb Q+FM_\omega(\mathbb Q)$
	$\mathbb Q[\mathbb Q]$
	$\mathbb Q[x,x^{-1}]$: Laurent polynomials
	$\mathbb Q[x,y,z]/(xz,yz)$
	$\mathbb Q[x,y]/(x^2, xy)$
	$\mathbb Q[x,y]/(x^2-y^3)$
	$\mathbb Q[X,Y]_{(X,Y)}$
	$\mathbb Q[x,y]_{(x,y)}/(x^2-y^3)$
	$\mathbb Q[x]$
	$\mathbb Q[x^{1/2},x^{1/4},x^{1/8},...]/(x)$
	$\mathbb Q[x_1, x_2,\ldots, x_n]$
	$\mathbb Q\langle a,b\rangle/(a^2)$
	$\mathbb Q\langle x, y\rangle$
	$\mathbb Q\langle x,y \rangle/(xy-1)$: the Toeplitz-Jacobson algebra
	$\mathbb Z$: the ring of integers
	$\mathbb Z+x\mathbb Q[x]$
	$\mathbb Z/(2)$
	$\mathbb Z/(n)$, $n$ divisible by two primes and a square
	$\mathbb Z/(n)$, $n$ squarefree and not prime
	$\mathbb Z/(p)$, $p$ an odd prime
	$\mathbb Z/(p^k)$, $p$ a prime, $k>1$
	$\mathbb Z[\frac{1+\sqrt{-19}}{2}]$
	$\mathbb Z[\sqrt{-5}]$
	$\mathbb Z[i]$: the Gaussian integers
	$\mathbb Z[x]$
	$\mathbb Z[X]/(X^2,4X, 8)$
	$\mathbb Z[X]/(X^2,8)$
	$\mathbb Z[x]/(x^2-1)$
	$\mathbb Z[x_0, x_1,x_2,\ldots]$
	$\mathbb Z\langle x,y\rangle/(y^2, yx)$
	$\mathbb Z\langle x_0, x_1,x_2,\ldots\rangle$
	$\mathbb Z_S$, where $S=((2)\cup(3))^c$
	$\mathbb Z_{(2)}$
	$\varinjlim T_{2^n}(\Bbb Q)$
	$\varinjlim \mathbb Q^{2^n}$
	$\varinjlim M_{2^n}(\mathbb Q)$
	$F_2[\mathcal Q_8]$
	$F_2[S_4]$
	$F_2[x,y]/(x,y)^2$
	$F_p(x)$
	$k[x,x^{-1};\sigma]$
	$k[x;\sigma]/(x^2)$ (not right Artinian)
	$M_n(\mathbb Q)$
	$M_n(F_2)$
	$T_n(\mathbb Q)$: the upper triangular matrix ring over $\mathbb Q$
	$T_n(F_2)$
	$T_n(F_q)$
	Akizuki's counterexample
	Algebra of differential operators on the line (1st Weyl algebra)
	Algebraic closure of $F_2$
	Algebraic integers
	Base ring for $R_{187}$
	Basic ring of Nakayama's QF ring
	Bass's right-not-left perfect ring
	Bergman's example showing that "compressible" is not Morita invariant
	Cohn's non-IBN domain
	Countably infinite boolean ring
	Custom Krull dimension valuation ring
	Division algebra with no anti-automorphism
	Division ring with an antihomomorphism but no involution
	Eventually constant sequences in $\mathbb Z$
	Field of algebraic numbers
	Field of constructible numbers
	Finitely cogenerated, not semilocal ring
	Grams' atomic domain which doesn't satisfy ACCP
	Grassmann algebra $\bigwedge (V)$, $\dim(V)=\aleph_0$
	Henselization of $\Bbb Z_{(2)}$
	Hochster's connected, nondomain, locally-domain ring
	Hurwitz quaternions
	Kasch not semilocal ring
	Left-not-right Noetherian domain
	Lipschitz quaternions
	Malcev's nonembeddable domain
	McCoy ring that is not Abelian
	Nakayama's quasi-Frobenius ring that isn't Frobenius
	Nielsen's right UGP, not left UGP ring
	Noetherian domain that is not N-1
	Non lift/rad matrix ring over a lift/rad base ring
	Non-symmetric $2$-primal ring
	Osofsky's $32$ element ring
	Perfect non-Artinian ring
	Perfect ring that isn't semiprimary
	Progression free polynomial ring
	Quasi-continuous ring that is not Ikeda-Nakayama
	Ram's Ore extension ring
	Rational quaternions
	reduced $I_0$ ring that is not exchange
	reduced exchange ring which is not semiregular
	Reversible non-symmetric ring
	Right-not-left ACC on annihilators triangular ring
	Right-not-left Artinian triangular ring
	Right-not-left coherent ring
	Right-not-left Kasch ring
	Right-not-left Noetherian triangular ring
	Right-not-left nonsingular ring
	Right-not-left simple injective ring
	Semicommutative $R$ such that $R[x]$ is not semicommutative
	Shepherdson's domain that is not stably finite
	Varadarajan's left-not-right coHopfian ring

Property: countable

Reference(s):

Metaproperties: