Pith Number

pith:W5FGX5WF

pith:2021:W5FGX5WFX2UBULDD5QR7FN3D2N

not attested not anchored not stored refs pending

Finding quadruply imaged quasars with machine learning. I. Methods

A. Akhazhanov, A. Amini, A. A. Plazas Malag\'on, A. Carnero Rosell, A. Choi, A. G. Kim, A. More, A. Palmese, A. Pieres, A. Shajib, B. Flaugher, B. Nord, C. Conselice, C. Hazlett, C. Lemon, C. To, D. A. Finley, D. Brooks, D. Gruen, D. J. James, D. L. Burke, D. L. Hollowood, D. W. Gerdes, E. Buckley-Geer, E. Sanchez, E. Suchyta, F. Andrade-Oliveira, F. Menanteau, F. Paz-Chinch\'on, G. Gutierrez, G. Tarle, H. Lin, I. Ferrero, I. Sevilla-Noarbe, J. Annis, J. Carretero, J. De Vicente, J. Frieman, J. Garc\'ia-Bellido, J. Gschwend, J. P. Dietrich, J. Weller, K. Honscheid, K. Kuehn, L. N. da Costa, M. A. G. Maia, M. Aguena, M. Carrasco Kind, M. Costanzi, M. E. C. Swanson, M. E. S. Pereira, M. Lima, M. March, M. Smith, M. Soares-Santos, N. Kuropatkin, O. Lahav, P. Doel, P. Schechter, R. A. Gruendl, R. Miquel, R. Morgan, S. Allam, S. Birrer, S. Desai, S. Everett, S. R. Hinton, S. Serrano, T. N. Varga, T. Treu, V. Scarpine

arxiv:2109.09781 v1 · 2021-09-20 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W5FGX5WFX2UBULDD5QR7FN3D2N}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T04:13:42.918334Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b74a6bf6c5bea81a2c63ec23f2b763d36c5d3fb20a7b6cc2d7212ac58bddf938

Aliases

arxiv: 2109.09781 · arxiv_version: 2109.09781v1 · doi: 10.48550/arxiv.2109.09781 · pith_short_12: W5FGX5WFX2UB · pith_short_16: W5FGX5WFX2UBULDD · pith_short_8: W5FGX5WF

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/W5FGX5WFX2UBULDD5QR7FN3D2N \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: b74a6bf6c5bea81a2c63ec23f2b763d36c5d3fb20a7b6cc2d7212ac58bddf938

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f74329bc24de073908c7459cc622ac9a15b8e0ed5b4449e599a38472471244b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2021-09-20T18:17:16Z",
    "title_canon_sha256": "d57bfca830f181beb950c34cb7d46a6e268bf42d4a4470fa07dad5d2021593ea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.09781",
    "kind": "arxiv",
    "version": 1
  }
}