Abstract
Over the last century, there have been considerable variations in the frequency of use and types of diagrams used in mathematical publications. In order to track these changes, we developed a method enabling large-scale quantitative analysis of mathematical publications to investigate the number and types of diagrams published in three leading mathematical journals in the period from 1885 to 2015. The results show that diagrams were relatively common at the beginning of the period under investigation. However, beginning in 1910, they were almost completely unused for about four decades before reappearing in the 1950s. The diagrams from the 1950s, however, were of a different type than those used earlier in the century. We see this change in publication practice as a clear indication that the formalist ideology has influenced mathematicians’ choice of representations. Although this could be seen as a minor stylistic aspect of mathematics, we argue that mathematicians’ representational practice is deeply connected to their cognitive practice and to the contentual development of the discipline. These changes in publication style therefore indicate more fundamental changes in the period under consideration.
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Notes
In Johansen et al. (2018) we named this category of diagrams “Cartesian diagrams”, but we have chosen to change the name to stress that it is a general category and not a particular type of diagrams.
The ‘in doubt’ code is included in the raw data set available at https://doi.org/10.17894/ucph.6e18e1c7-7eef-4445-8d9c-3b4d38949079. The reader can thus see which concrete papers we were in doubt about and how we chose to code them.
Although there are exceptions. For instance, we consider knot diagrams to be resemblance diagrams due to the clear topological resemblance with the objects they model, but it can be claimed that such diagrams can be used for rigorous, semi-syntactic manipulations (e.g. (Toffoli & Giardino, 2014)).
We are indebted to one of the anonymous reviewers for pointing out the connection between representations and known results and proof tecniques.
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Acknowledgements
We wish to thank professor Morten Misfeldt, University of Copenhagen, for his contribution to the original idea and design of the study. We also wish to thank the editors of Annals of Mathematics for kindly letting us reproduce diagrams from the journal.
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Johansen, M.W., Pallavicini, J.L. Entering the valley of formalism: trends and changes in mathematicians’ publication practice—1885 to 2015. Synthese 200, 239 (2022). https://doi.org/10.1007/s11229-022-03741-8
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DOI: https://doi.org/10.1007/s11229-022-03741-8