DaRT - Ring Property 72

Rings

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

Property: (right/left) Rickart

Reference(s):

Metaproperties: