Pith Number

pith:T7DDPTCF

pith:2015:T7DDPTCFAR7I5NKMBVBBOATAFK

not attested not anchored not stored refs pending

ALFA: an automated line fitting algorithm

Roger Wesson

arxiv:1512.04539 v1 · 2015-12-14 · astro-ph.SR

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

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	2026-05-18T01:22:19.541248Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9fc637cc45047e8eb54c0d421702602aa23a017d63d45c9ab300d7f04cbb5b77

Aliases

arxiv: 1512.04539 · arxiv_version: 1512.04539v1 · doi: 10.48550/arxiv.1512.04539 · pith_short_12: T7DDPTCFAR7I · pith_short_16: T7DDPTCFAR7I5NKM · pith_short_8: T7DDPTCF

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/T7DDPTCFAR7I5NKMBVBBOATAFK \
  | 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: 9fc637cc45047e8eb54c0d421702602aa23a017d63d45c9ab300d7f04cbb5b77

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5560566dd5530769dce0caccd34a5bb0d18ed6c8269ac13fdefb84b2c98e117",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2015-12-14T21:00:32Z",
    "title_canon_sha256": "ee339ef6c23d17028ae3c280bd374cca3aa5ea55afe500655b5674e12a7994a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.04539",
    "kind": "arxiv",
    "version": 1
  }
}