Pith Number

pith:52PDIX5X

pith:2014:52PDIX5XPUPBG3M7YIJ2HPCP3I

not attested not anchored not stored refs pending

Greenland Telescope Project --- Direct Confirmation of Black Hole with Sub-millimeter VLBI

B. Liu, C.-C. Chang, C.-Y. Kuo, D.Y. Kubo, E. Keto, G. Nystrom, H. Hirashita, H. Jiang, H. Nishioka, H.-Y. Pu, H.-Y. Shen, J.C. Algaba-Marcos, J. Han, K. Asada, M. Inoue, M. Nakamura, M.-T. Chen, N. Patel, N. Pradel, P.A. Raffin, P. Grimes, P. Martin-Cocher, P.M. Koch, P. Napier, P.T.P. Ho, R. Blundell, R. Burgos, R. Srinivasan, S. Matsushita, S.-N. Hsieh, S. Paine, S.S. Doeleman, T. Huang, T.K. Sridharan, T.-S. Wei, V. Fish, W. Brisken, W. Snow, Z. Meyer-Zhao

arxiv:1407.2450 v1 · 2014-07-09 · astro-ph.IM · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{52PDIX5XPUPBG3M7YIJ2HPCP3I}

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	2026-05-18T01:42:38.663881Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ee9e345fb77d1e136d9fc213a3bc4fda0c0f13255069b4a28084ec6ae9b7f62c

Aliases

arxiv: 1407.2450 · arxiv_version: 1407.2450v1 · doi: 10.48550/arxiv.1407.2450 · pith_short_12: 52PDIX5XPUPB · pith_short_16: 52PDIX5XPUPBG3M7 · pith_short_8: 52PDIX5X

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/52PDIX5XPUPBG3M7YIJ2HPCP3I \
  | 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: ee9e345fb77d1e136d9fc213a3bc4fda0c0f13255069b4a28084ec6ae9b7f62c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "270fbc8e62f7fda6021266a8854b7e9f9409768005733c10cf903365f6aa7f0b",
    "cross_cats_sorted": [
      "astro-ph.HE"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2014-07-09T12:13:55Z",
    "title_canon_sha256": "38cc231022d768b7ac08137eb757af8569ab3dccba97a76fdc1bd911c63cde54"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.2450",
    "kind": "arxiv",
    "version": 1
  }
}