Pith Number

pith:MJEMWBWR

pith:2009:MJEMWBWRCK2TCLHOL7RZWMTJPK

not attested not anchored not stored refs pending

Testing galaxy formation scenarios with a new mass estimator

Joe Wolf

arxiv:0912.0019 v1 · 2009-11-30 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MJEMWBWRCK2TCLHOL7RZWMTJPK}

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	2026-05-18T02:34:02.922604Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6248cb06d112b5312cee5fe39b32697a8aa52fdf67a7e976eeb7f7e05a84daf2

Aliases

arxiv: 0912.0019 · arxiv_version: 0912.0019v1 · doi: 10.48550/arxiv.0912.0019 · pith_short_12: MJEMWBWRCK2T · pith_short_16: MJEMWBWRCK2TCLHO · pith_short_8: MJEMWBWR

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/MJEMWBWRCK2TCLHOL7RZWMTJPK \
  | 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: 6248cb06d112b5312cee5fe39b32697a8aa52fdf67a7e976eeb7f7e05a84daf2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "219bf070f44398f4aee40f9e2b4d4d987e912c8e66abcddfe9525463523c64ef",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-30T22:41:21Z",
    "title_canon_sha256": "2f4c8fa2c5598fda1ff88df895280e7ae1d74e69b40b7c906100c1e595749d81"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0019",
    "kind": "arxiv",
    "version": 1
  }
}