Pith Number

pith:6UUDF3OT

pith:2019:6UUDF3OTSFE7RLT5EAAC762B2L

not attested not anchored not stored refs pending

On the travel time tomography problem in 3D

Michael V. Klibanov

arxiv:1905.09354 v1 · 2019-05-22 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6UUDF3OTSFE7RLT5EAAC762B2L}

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	2026-05-17T23:45:19.483938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f52832edd39149f8ae7d20002ffb41d2e05129fc1c7b1fb531944ff4ca9c3e5e

Aliases

arxiv: 1905.09354 · arxiv_version: 1905.09354v1 · doi: 10.48550/arxiv.1905.09354 · pith_short_12: 6UUDF3OTSFE7 · pith_short_16: 6UUDF3OTSFE7RLT5 · pith_short_8: 6UUDF3OT

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/6UUDF3OTSFE7RLT5EAAC762B2L \
  | 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: f52832edd39149f8ae7d20002ffb41d2e05129fc1c7b1fb531944ff4ca9c3e5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88767f0cb115efbd7c4f292726714e5b107ee3cd82a7e247d8696ebca7e5d0bd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-05-22T20:26:46Z",
    "title_canon_sha256": "b20b411c2c56bb44257008205c5ad6ef8ae50ce1197db42ae0b788266c23ae34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.09354",
    "kind": "arxiv",
    "version": 1
  }
}