Pith Number

pith:T6SFX4E2

pith:2013:T6SFX4E2BYZHBTSHILU4JYQEWD

not attested not anchored not stored refs pending

Man Versus Machine: Eye Estimates in the Age of Digital Imaging

Wayne Osborn

arxiv:1310.0540 v1 · 2013-10-02 · astro-ph.IM · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T6SFX4E2BYZHBTSHILU4JYQEWD}

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	2026-05-18T03:11:34.985424Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fa45bf09a0e3270ce4742e9c4e204b0eec2217fb424759430bb6592af5d525c

Aliases

arxiv: 1310.0540 · arxiv_version: 1310.0540v1 · doi: 10.48550/arxiv.1310.0540 · pith_short_12: T6SFX4E2BYZH · pith_short_16: T6SFX4E2BYZHBTSH · pith_short_8: T6SFX4E2

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/T6SFX4E2BYZHBTSHILU4JYQEWD \
  | 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: 9fa45bf09a0e3270ce4742e9c4e204b0eec2217fb424759430bb6592af5d525c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "056154084ae2acbb6c9573780cfb75cb62e597cdd44530ab621bf7eb633162bc",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-10-02T01:23:28Z",
    "title_canon_sha256": "28cffba4dfd6d555f5f6a5467877c0239c4ffde7710bd9bc6c2b0b7c34073865"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.0540",
    "kind": "arxiv",
    "version": 1
  }
}