#### Filter Results:

- Full text PDF available (15)

#### Publication Year

1979

2013

- This year (0)
- Last 5 years (2)
- Last 10 years (9)

#### Publication Type

#### Co-author

#### Journals and Conferences

Learn More

Assuming the continuum hypothesis, we show that the Calkin algebra has 2 ℵ 1 outer automorphisms. Let H be a separable infinite dimensional Hilbert space, let L(H) be the algebra of bounded operators… (More)

- Charles A. Akemann, Nik Weaver
- Proceedings of the National Academy of Sciences…
- 2008

Assuming the continuum hypothesis, we prove that Bernoulli function(H) has a pure state whose restriction to any masa is not pure. This resolves negatively old conjectures of Kadison and Singer and… (More)

- Nik Weaver
- 2009

We review the philosophical framework of mathematical conceptualism as an alternative to set-theoretic foundations and show how mainstream mathematics can be developed on this basis. The paper… (More)

- Charles A. Akemann, Nik Weaver
- Proceedings of the National Academy of Sciences…
- 2004

We construct a C*-algebra that has only one irreducible representation up to unitary equivalence but is not isomorphic to the algebra of compact operators on any Hilbert space. This answers an old… (More)

- Nik Weaver, J. L. Williams, +4 authors S. R. Palmer
- Journal of epidemiology and community health
- 2002

STUDY OBJECTIVE
To develop a cross disciplinary literature search methodology for conducting systematic reviews of all types of research investigating aspects of the built environment and the health… (More)

We prove that all the pure states of the reduced C*-algebra of a free group on an uncountable set of generators are *-automorphism equivalent and extract some consequences of this fact. (AMS… (More)

- Nik Weaver, Fiona Wardell, Florence Martin
- American journal of mental deficiency
- 1979

Sixteen mentally retarded children who had normal hearing were examined with two tests of auditory sensitivity. One procedure employed a tangibly reinforced operant-conditioning paradigm for pure… (More)

- Nik Weaver
- 2013

By “the semantic conception of proof” we mean the idea of a proof as a deductive argument that compels rational assent, in contrast to the syntactic conception of a proof as a combinatorial object… (More)

For any metric space X, the predual of Lip(X) is unique. If X has finite diameter or is convex — in particular, if it is a Banach space — then the predual of Lip 0 (X) is unique.

- Nik Weaver
- 2009

Metaphysical interpretations of set theory are either inconsistent or incoherent. The uses of sets in mathematics actually involve three distinct kinds of collections (surveyable, definite, and… (More)