History of arxiv_authors

The changes to the source code of this entry in the repository, newest first, each with the differences it made to the entry's files. They are also listed on GitLab.

2026-11-03 [entries] Add the date when each entry was added, and remove icon_hash by Tiago de Paula Peixoto beff7c9

The dates are those of the commits that first added the entries' files
(2020-08-11 for the entries of the initial commit); renamed entries keep
the date of their first name.

Changed: none

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 07863ae..8abc1b7 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -35,7 +35,7 @@ url = ['https://snap.stanford.edu/data/ca-AstroPh.html',
        'https://snap.stanford.edu/data/ca-HepPh.html',
        'https://snap.stanford.edu/data/ca-HepTh.html']
 citation = [('J. Leskovec, J. Kleinberg and C. Faloutsos. "Graph Evolution: Densification and Shrinking Diameters." ACM Transactions on Knowledge Discovery from Data 1(1), article 2 (2007).', 'https://doi.org/10.1145/1217299.1217301')]
-icon_hash = '56a85c8e26855e083a2f78b9'
+date_added = '2020-08-11'
 upstream_license = None
 upstream_prefix = 'http://snap.stanford.edu/data'
 files = [(f'ca-{d}.txt.gz', f'{d}', 'snap') for d in ['AstroPh','CondMat','GrQc', 'HepPh', 'HepTh']]

2026-11-02 [entries] Remove unneeded code from the entries by Tiago de Paula Peixoto 2c69f19

Unneeded "global files" statements, unused imports and variables,
f-strings without placeholders, duplicate keys in foodweb_little_rock
(keeping the order and the values used), and the second definition of
get_lines() in twitter_higgs. Nothing changes in the networks or
descriptions.

Changed: none

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 737b55f..07863ae 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -48,7 +48,6 @@ def fetch_upstream(force=False):
 @coerce_props()
 @annotate()
 def parse(alts=None):
-    global files
     name = __name__.split(".")[-1]
     for fnames, alt, fmt in files:
         if alts is not None and alt not in alts:

2026-10-25 [entries] Fix parse bugs and improve descriptions and metadata by Tiago de Paula Peixoto 6bb6851

- parse fixes from the review of the descriptions, e.g. us_patents
  (directed), celegans_2019 (synapse direction), ecoli_transcription and
  yeast_transcription (regulator to target), bitcoin (direction, phantom
  node), ego_social (Google+ features and circles), scotus_majority,
  arxiv_authors and social_location (as in SNAP), caida_as, dnc, dom,
  mist, reuters and bibsonomy (names on the right nodes), uci_zoo
- every description now states explicitly what the nodes and edges
  represent; corrected titles, years, tags, citations and licences
- the "Hypergraph" tag is removed; very large entries are marked
  `huge = True` (see --skip-huge)
- ICON ids of partial duplicates added (hiv_transmission, congress_bills,
  openflights, dutch_school)

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 0f62235..737b55f 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -19,13 +19,24 @@
 from .. import *
 
 title = "Arxiv authors (1993-2003)"
-description = """Scientific collaborations between authors of papers submitted to arxiv.org, under 5 categories: gr-qc, astro-ph, cond-mat, hep-ph, and hep-th categories, spanning January 1993 to April 2003. If an author i co-authored a paper with author j, the graph contains a undirected edge from i to j. If the paper is co-authored by k authors this generates a completely connected (sub)graph on k nodes.[^icon]
-[^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
+description = """Co-authorship networks of scientists who submitted papers to five categories of the arXiv e-print repository, compiled by J. Leskovec, J. Kleinberg and C. Faloutsos. The data cover papers submitted from January 1993 to April 2003 (124 months), beginning a few months after the inception of arXiv. Nodes are authors, and an undirected edge connects two authors if they co-authored at least one paper; a paper with $k$ authors thus generates a fully connected subgraph on $k$ nodes. Authors are identified by anonymous numeric identifiers, stored in the node property `name`, and the networks have no other node or edge properties. The few self-loops of the source edge lists are removed.
+
+There is one network per arXiv category:
+
+- `AstroPh`: astrophysics (astro-ph);
+- `CondMat`: condensed matter physics (cond-mat);
+- `GrQc`: general relativity and quantum cosmology (gr-qc);
+- `HepPh`: high energy physics, phenomenology (hep-ph);
+- `HepTh`: high energy physics, theory (hep-th)."""
 tags = ['Social', 'Collaboration', 'Unweighted', 'Projection']
-url = 'http://snap.stanford.edu/data/ca-GrQc.html'
-citation = [('Leskovec, J. Kleinberg and C. Faloutsos. "Graph Evolution: Densification and Shrinking Diameters." ACM Transactions on Knowledge Discovery from Data 1(1), article 2 (2007).', 'https://doi.org/10.1145/1217299.1217301')]
+url = ['https://snap.stanford.edu/data/ca-AstroPh.html',
+       'https://snap.stanford.edu/data/ca-CondMat.html',
+       'https://snap.stanford.edu/data/ca-GrQc.html',
+       'https://snap.stanford.edu/data/ca-HepPh.html',
+       'https://snap.stanford.edu/data/ca-HepTh.html']
+citation = [('J. Leskovec, J. Kleinberg and C. Faloutsos. "Graph Evolution: Densification and Shrinking Diameters." ACM Transactions on Knowledge Discovery from Data 1(1), article 2 (2007).', 'https://doi.org/10.1145/1217299.1217301')]
 icon_hash = '56a85c8e26855e083a2f78b9'
-ustream_license = None
+upstream_license = None
 upstream_prefix = 'http://snap.stanford.edu/data'
 files = [(f'ca-{d}.txt.gz', f'{d}', 'snap') for d in ['AstroPh','CondMat','GrQc', 'HepPh', 'HepTh']]
 
@@ -46,5 +57,10 @@ def parse(alts=None):
             fnames = [fnames]
         with ExitStack() as stack:
             fs = [stack.enter_context(open_upstream_file(name, fn, "rb")) for fn in fnames]
-            g = parse_graph(fs, fmt, directed=False)
+            # the source lists each edge in both directions, and includes a
+            # few self-loops; node ids are not contiguous
+            g = parse_graph(fs, (fmt, dict(hashed=True)), directed=False)
+            remove_parallel_edges(g)
+            remove_self_loops(g)
+            g = Graph(g, vorder=g.vp.name)
         yield alt, g

2026-10-24 Update copyright information by Tiago de Paula Peixoto 73a4f0d

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 6856b38..0f62235 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020-2024 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2026 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2024-05-27 Update copyright information by Tiago de Paula Peixoto 3d288ea

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 822d17d..6856b38 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020-2023 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2024 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2023-02-19 Update copyright information by Tiago de Paula Peixoto 8d005ae

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 5cf37c4..822d17d 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2021 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2020-2023 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2021-06-22 Update copyright info by Tiago de Paula Peixoto db2efcc

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 67b04d4..5cf37c4 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
-# Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
+# Copyright (C) 2021 Tiago de Paula Peixoto <tiago@skewed.de>
 #
 # This program is free software: you can redistribute it and/or modify it under
 # the terms of the GNU Affero General Public License as published by the Free

2020-11-28 Update citations to use DOIs by Tiago de Paula Peixoto e878874

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index f3beb68..67b04d4 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -23,7 +23,7 @@ description = """Scientific collaborations between authors of papers submitted t
 [^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
 tags = ['Social', 'Collaboration', 'Unweighted', 'Projection']
 url = 'http://snap.stanford.edu/data/ca-GrQc.html'
-citation = [('Leskovec, J. Kleinberg and C. Faloutsos. "Graph Evolution: Densification and Shrinking Diameters." ACM Transactions on Knowledge Discovery from Data 1(1), article 2 (2007).', 'http://www.cs.cmu.edu/~jure/pubs/powergrowth-tkdd.pdf')]
+citation = [('Leskovec, J. Kleinberg and C. Faloutsos. "Graph Evolution: Densification and Shrinking Diameters." ACM Transactions on Knowledge Discovery from Data 1(1), article 2 (2007).', 'https://doi.org/10.1145/1217299.1217301')]
 icon_hash = '56a85c8e26855e083a2f78b9'
 ustream_license = None
 upstream_prefix = 'http://snap.stanford.edu/data'

2020-09-15 Change license from GPLv3 to AGPLv3 by Tiago de Paula Peixoto d754be5

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 6a76361..f3beb68 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -3,18 +3,18 @@
 #
 # Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option) any
+# later version.
 #
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
 #
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# You should have received a copy of the GNU Affero General Public License along
+# with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from .. import *

2020-09-13 Add explicit attribution to descriptions obtained from ICON by Tiago de Paula Peixoto 1645314

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
index 313ca6b..6a76361 100644
--- a/entries/arxiv_authors/__init__.py
+++ b/entries/arxiv_authors/__init__.py
@@ -19,7 +19,8 @@
 from .. import *
 
 title = "Arxiv authors (1993-2003)"
-description = "Scientific collaborations between authors of papers submitted to arxiv.org, under 5 categories: gr-qc, astro-ph, cond-mat, hep-ph, and hep-th categories, spanning January 1993 to April 2003. If an author i co-authored a paper with author j, the graph contains a undirected edge from i to j. If the paper is co-authored by k authors this generates a completely connected (sub)graph on k nodes."
+description = """Scientific collaborations between authors of papers submitted to arxiv.org, under 5 categories: gr-qc, astro-ph, cond-mat, hep-ph, and hep-th categories, spanning January 1993 to April 2003. If an author i co-authored a paper with author j, the graph contains a undirected edge from i to j. If the paper is co-authored by k authors this generates a completely connected (sub)graph on k nodes.[^icon]
+[^icon]: Description obtained from the [ICON](https://icon.colorado.edu) project."""
 tags = ['Social', 'Collaboration', 'Unweighted', 'Projection']
 url = 'http://snap.stanford.edu/data/ca-GrQc.html'
 citation = [('Leskovec, J. Kleinberg and C. Faloutsos. "Graph Evolution: Densification and Shrinking Diameters." ACM Transactions on Knowledge Discovery from Data 1(1), article 2 (2007).', 'http://www.cs.cmu.edu/~jure/pubs/powergrowth-tkdd.pdf')]

2020-08-11 Initial commit by Tiago de Paula Peixoto cc85872

diff --git a/entries/arxiv_authors/__init__.py b/entries/arxiv_authors/__init__.py
new file mode 100644
index 0000000..313ca6b
--- /dev/null
+++ b/entries/arxiv_authors/__init__.py
@@ -0,0 +1,49 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020 Tiago de Paula Peixoto <tiago@skewed.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from .. import *
+
+title = "Arxiv authors (1993-2003)"
+description = "Scientific collaborations between authors of papers submitted to arxiv.org, under 5 categories: gr-qc, astro-ph, cond-mat, hep-ph, and hep-th categories, spanning January 1993 to April 2003. If an author i co-authored a paper with author j, the graph contains a undirected edge from i to j. If the paper is co-authored by k authors this generates a completely connected (sub)graph on k nodes."
+tags = ['Social', 'Collaboration', 'Unweighted', 'Projection']
+url = 'http://snap.stanford.edu/data/ca-GrQc.html'
+citation = [('Leskovec, J. Kleinberg and C. Faloutsos. "Graph Evolution: Densification and Shrinking Diameters." ACM Transactions on Knowledge Discovery from Data 1(1), article 2 (2007).', 'http://www.cs.cmu.edu/~jure/pubs/powergrowth-tkdd.pdf')]
+icon_hash = '56a85c8e26855e083a2f78b9'
+ustream_license = None
+upstream_prefix = 'http://snap.stanford.edu/data'
+files = [(f'ca-{d}.txt.gz', f'{d}', 'snap') for d in ['AstroPh','CondMat','GrQc', 'HepPh', 'HepTh']]
+
+def fetch_upstream(force=False):
+    return fetch_upstream_files(__name__.split(".")[-1], upstream_prefix, files,
+                                force)
+
+@cache_network()
+@coerce_props()
+@annotate()
+def parse(alts=None):
+    global files
+    name = __name__.split(".")[-1]
+    for fnames, alt, fmt in files:
+        if alts is not None and alt not in alts:
+            continue
+        if isinstance(fnames, str):
+            fnames = [fnames]
+        with ExitStack() as stack:
+            fs = [stack.enter_context(open_upstream_file(name, fn, "rb")) for fn in fnames]
+            g = parse_graph(fs, fmt, directed=False)
+        yield alt, g