Pith Number

pith:W47IBHJD

pith:2019:W47IBHJDBXWKHU4P7GICET5DMT

not attested not anchored not stored refs pending

An Infalling Observer and Behind the Horizon Cutoff

Amin Akhavan, Mohsen Alishahiha

arxiv:1908.03502 v2 · 2019-08-08 · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W47IBHJDBXWKHU4P7GICET5DMT}

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	2026-07-05T00:35:19.453429Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b73e809d230deca3d38ff990224fa364cd200b785926c9eae3bd6837d7447e19

Aliases

arxiv: 1908.03502 · arxiv_version: 1908.03502v2 · doi: 10.48550/arxiv.1908.03502 · pith_short_12: W47IBHJDBXWK · pith_short_16: W47IBHJDBXWKHU4P · pith_short_8: W47IBHJD

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/W47IBHJDBXWKHU4P7GICET5DMT \
  | 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: b73e809d230deca3d38ff990224fa364cd200b785926c9eae3bd6837d7447e19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dfb3d46c92911d692b2237f24cd38f75dcee9a6988b028b6be711f7b3988d2e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2019-08-08T12:07:22Z",
    "title_canon_sha256": "cc47d7007c5c96eeb29fd29087b9bdb916f8a2d3f699822bcbd16deb2a707c40"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.03502",
    "kind": "arxiv",
    "version": 2
  }
}