Pith Number

pith:ZMULYYMS

pith:2013:ZMULYYMSR7TQUQ4BUQZ2XRN3RQ

not attested not anchored not stored refs pending

Null tests of the cosmological constant using supernovae

Chris Clarkson (UCT), ICG Portsmouth), Marina Seikel (UWC), Mathew Smith (UWC), Roy Maartens (UWC, Sahba Yahya (UWC)

arxiv:1308.4099 v2 · 2013-08-19 · 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{ZMULYYMSR7TQUQ4BUQZ2XRN3RQ}

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	2026-05-18T01:48:13.902734Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb28bc61928fe70a4381a433abc5bb8c3b0d7e5378adb52c688848831d1475c1

Aliases

arxiv: 1308.4099 · arxiv_version: 1308.4099v2 · doi: 10.48550/arxiv.1308.4099 · pith_short_12: ZMULYYMSR7TQ · pith_short_16: ZMULYYMSR7TQUQ4B · pith_short_8: ZMULYYMS

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/ZMULYYMSR7TQUQ4BUQZ2XRN3RQ \
  | 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: cb28bc61928fe70a4381a433abc5bb8c3b0d7e5378adb52c688848831d1475c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3eb9016537201a28113c8065e21c699f84572d17726314d8eee5a3a9ef92b23",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-08-19T18:59:49Z",
    "title_canon_sha256": "4da9ce9bc5d4d90f5ff6b6be1cabfac7c26131b172d8f243545a2e0b2165fee6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.4099",
    "kind": "arxiv",
    "version": 2
  }
}