B W Roberts
Dados Biográficos
| ID | 185362 |
|---|---|
| NOME | B W Roberts |
| PRENOMES | B W |
| SOBRENOME | Roberts |
| ASSINATURA | ROBERTS B W |
| AFILIAÇÕES | London School of Economics and Political Science |
| ORCID | 0000-0003-0548-1280 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 25 |
| TOTAL DE CITAÇÕES | 57 |
| TOTAL COMO AUTOR | 25 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1967 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2025 |
| ÍNDICE H | 5 |
The Conventionality of Geometry Is Merely Incomplete
This article proves two no-go results against the conventionality of geometry. I then argue that any remaining conventionality arises from scientific incompleteness. I illustrate by introducing a new kind of conventionality arising in the presence of higher spatial dimensions, where the incompleteness is resolved by introducing new physical theories like Kaluza–Klein theory. Thus, conventional choices of this kind may guide scientific discovery, …
The economic benefits of trade facilitation
We evaluate the impacts of the Customs and Border Protection (CBP) Center of Excellence and Expertise (CEE) Program on the U.S. trade community. CBP established ten CEEs in order to facilitate trade by removing non‐tariff barriers. CEEs process importers at “virtual” centres as opposed to individual ports of entry, and they are specialised according to particular sectors. CEEs were anticipated to use government resources more efficiently, reduce …
Observables, disassembled
Three Myths about Time Reversal in Quantum Theory
Many have suggested that the transformation standardly referred to as ‘time reversal’ in quantum theory is not deserving of the name. I argue on the contrary that the standard definition is perfectly appropriate and is indeed forced by basic considerations about the nature of time in the quantum formalism
Unreal Observables
This article argues that quantum observables can include not just self-adjoint operators but any member of the class of normal operators, including those with nonreal eigenvalues. Concrete experiments, statistics, and symmetries are all expressed in this more general context. However, this more general class of observables also requires a new restriction on sets of operators that can be interpreted as observables at once, called ‘sharp sets’
Comment on Ashtekar
Three merry roads to T-violation
A general perspective on time observables
When We Do (and Do Not) Have a Classical Arrow of Time
I point out that some common folk wisdom about time reversal invariance in classical mechanics is strictly incorrect, by showing some explicit examples in which classical time reversal invariance fails, even among conservative systems. I then show that there is nevertheless a broad class of familiar classical systems that are time reversal invariant
The Simple Failure of Curie’s Principle
I point out a simple sense in which the standard formulation of Curie’s principle is false when the symmetry transformation it describes is time reversal
How Galileo dropped the ball and Fermat picked it up
Group Structural Realism
We present a precise form of structural realism, called group structural realism, which identifies ‘structure’ in quantum theory with symmetry groups. However, working out the details of this view actually illuminates a major problem for structural realism; namely, a structure can itself have structure. This article argues that, once a precise characterization of structure is given, the ‘metaphysical hierarchy’ on which group structural realism r…
Women and Survival in Mexican Cities
Latin America
New Approaches to Economic Life
Miners, Peasants and Entrepreneurs
Miners, Peasants and Entrepreneurs
Miners, Peasants, and Entrepreneurs
This volume traces the development of the central highlands, one of Peru's major mining regions. It draws on extensive fieldwork carried out in Peru between 1970 and 1982, spanning a reforming military government, reaction and a return to civilian politics under Belaunde. Through historical material combined with field studies of villages and of the major town of the region, Huancayo, the book examines the economic and cultural processes underlyi…
Miners, Peasants and Entrepreneurs
Miners, Peasants and Entrepreneurs
To Dwell among Friends
An analysis of the influence of urban life on society compares and contrasts personal relationships in large cities with those in small towns
Crucifixion by Power. Essays on Guatemalan National Social Structure, 1944-1966
Malawi Progress and Problems Since Independence
Journal Article MALAWI PROGRESS AND PROBLEMS SINCE INDEPENDENCE Get access BRYAN ROBERTS, CMG, QC BRYAN ROBERTS, CMG, QC Attorney General and Secretary to the President and Cabinet, Malawi Search for other works by this author on: Oxford Academic Google Scholar African Affairs, Volume 69, Issue 274, January 1970, Pages 60–64, https://doi.org/10.1093/oxfordjournals.afraf.a095958 Published: 01 January 1970
The City in Newly Developing Countries
Relative Deprivation and Social Justice
The City in Newly Developing Countries
Group Structural Realism
We present a precise form of structural realism, called group structural realism, which identifies ‘structure’ in quantum theory with symmetry groups. However, working out the details of this view actually illuminates a major problem for structural realism; namely, a structure can itself have structure. This article argues that, once a precise characterization of structure is given, the ‘metaphysical hierarchy’ on which group structural realism r…
Women and Survival in Mexican Cities
Three Myths about Time Reversal in Quantum Theory
Many have suggested that the transformation standardly referred to as ‘time reversal’ in quantum theory is not deserving of the name. I argue on the contrary that the standard definition is perfectly appropriate and is indeed forced by basic considerations about the nature of time in the quantum formalism
Miners, Peasants and Entrepreneurs
The Simple Failure of Curie’s Principle
I point out a simple sense in which the standard formulation of Curie’s principle is false when the symmetry transformation it describes is time reversal
When We Do (and Do Not) Have a Classical Arrow of Time
I point out that some common folk wisdom about time reversal invariance in classical mechanics is strictly incorrect, by showing some explicit examples in which classical time reversal invariance fails, even among conservative systems. I then show that there is nevertheless a broad class of familiar classical systems that are time reversal invariant
Relative Deprivation and Social Justice
The City in Newly Developing Countries
Malawi Progress and Problems Since Independence
Journal Article MALAWI PROGRESS AND PROBLEMS SINCE INDEPENDENCE Get access BRYAN ROBERTS, CMG, QC BRYAN ROBERTS, CMG, QC Attorney General and Secretary to the President and Cabinet, Malawi Search for other works by this author on: Oxford Academic Google Scholar African Affairs, Volume 69, Issue 274, January 1970, Pages 60–64, https://doi.org/10.1093/oxfordjournals.afraf.a095958 Published: 01 January 1970
Crucifixion by Power. Essays on Guatemalan National Social Structure, 1944-1966
To Dwell among Friends
An analysis of the influence of urban life on society compares and contrasts personal relationships in large cities with those in small towns
Miners, Peasants and Entrepreneurs
Miners, Peasants, and Entrepreneurs
This volume traces the development of the central highlands, one of Peru's major mining regions. It draws on extensive fieldwork carried out in Peru between 1970 and 1982, spanning a reforming military government, reaction and a return to civilian politics under Belaunde. Through historical material combined with field studies of villages and of the major town of the region, Huancayo, the book examines the economic and cultural processes underlyi…
Miners, Peasants and Entrepreneurs
Miners, Peasants and Entrepreneurs
Miners, Peasants and Entrepreneurs
New Approaches to Economic Life
Latin America
Women and Survival in Mexican Cities
How Galileo dropped the ball and Fermat picked it up
Group Structural Realism
We present a precise form of structural realism, called group structural realism, which identifies ‘structure’ in quantum theory with symmetry groups. However, working out the details of this view actually illuminates a major problem for structural realism; namely, a structure can itself have structure. This article argues that, once a precise characterization of structure is given, the ‘metaphysical hierarchy’ on which group structural realism r…
When We Do (and Do Not) Have a Classical Arrow of Time
I point out that some common folk wisdom about time reversal invariance in classical mechanics is strictly incorrect, by showing some explicit examples in which classical time reversal invariance fails, even among conservative systems. I then show that there is nevertheless a broad class of familiar classical systems that are time reversal invariant
The Simple Failure of Curie’s Principle
I point out a simple sense in which the standard formulation of Curie’s principle is false when the symmetry transformation it describes is time reversal
A general perspective on time observables
Comment on Ashtekar
Three merry roads to T-violation
Three Myths about Time Reversal in Quantum Theory
Many have suggested that the transformation standardly referred to as ‘time reversal’ in quantum theory is not deserving of the name. I argue on the contrary that the standard definition is perfectly appropriate and is indeed forced by basic considerations about the nature of time in the quantum formalism
Unreal Observables
This article argues that quantum observables can include not just self-adjoint operators but any member of the class of normal operators, including those with nonreal eigenvalues. Concrete experiments, statistics, and symmetries are all expressed in this more general context. However, this more general class of observables also requires a new restriction on sets of operators that can be interpreted as observables at once, called ‘sharp sets’
Observables, disassembled
The economic benefits of trade facilitation
We evaluate the impacts of the Customs and Border Protection (CBP) Center of Excellence and Expertise (CEE) Program on the U.S. trade community. CBP established ten CEEs in order to facilitate trade by removing non‐tariff barriers. CEEs process importers at “virtual” centres as opposed to individual ports of entry, and they are specialised according to particular sectors. CEEs were anticipated to use government resources more efficiently, reduce …
The Conventionality of Geometry Is Merely Incomplete
This article proves two no-go results against the conventionality of geometry. I then argue that any remaining conventionality arises from scientific incompleteness. I illustrate by introducing a new kind of conventionality arising in the presence of higher spatial dimensions, where the incompleteness is resolved by introducing new physical theories like Kaluza–Klein theory. Thus, conventional choices of this kind may guide scientific discovery, …
Physics (10 obras) · Geography (9 obras) · Mathematics (9 obras) · Quantum Mechanics and Applications (9 obras) · Quantum mechanics (8 obras) · Economic geography (7 obras) · Political science (7 obras) · Theoretical physics (7 obras) · Economics (6 obras) · Epistemology (5 obras)