Pith Number

pith:7AI2KELF

pith:2009:7AI2KELFQ36B3UGJZVG4NAFT35

not attested not anchored not stored refs pending

At the other end of the sun's path. A new interpretation of Machu Picchu

Giulio Magli

arxiv:0904.4882 v2 · 2009-04-30 · physics.hist-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7AI2KELFQ36B3UGJZVG4NAFT35}

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	2026-05-18T01:27:37.378077Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f811a5116586fc1dd0c9cd4dc680b3df6bfd70aac84ea69c6de6909119f4f5c2

Aliases

arxiv: 0904.4882 · arxiv_version: 0904.4882v2 · doi: 10.48550/arxiv.0904.4882 · pith_short_12: 7AI2KELFQ36B · pith_short_16: 7AI2KELFQ36B3UGJ · pith_short_8: 7AI2KELF

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/7AI2KELFQ36B3UGJZVG4NAFT35 \
  | 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: f811a5116586fc1dd0c9cd4dc680b3df6bfd70aac84ea69c6de6909119f4f5c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8818eb44216d14efa084c2c6e055cd203b1a578c89751d6efb3bbcc4abec006b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2009-04-30T16:39:39Z",
    "title_canon_sha256": "39a4c8ea3f4a958d99cd1a84ccb97fced5825ee6385426530a2de8ac994b73a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4882",
    "kind": "arxiv",
    "version": 2
  }
}