Pith Number

pith:X6ETWZRP

pith:2015:X6ETWZRP7PWZKJ4MREJWTWQB7N

not attested not anchored not stored refs pending

Inverse problems for general second order hyperbolic equations with time-dependent coefficients

Gregory Eskin

arxiv:1503.00825 v4 · 2015-03-03 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{X6ETWZRP7PWZKJ4MREJWTWQB7N}

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	2026-05-18T00:40:14.284124Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf893b662ffbed95278c891369da01fb4a557ade39b10182cbbef0b668971a49

Aliases

arxiv: 1503.00825 · arxiv_version: 1503.00825v4 · doi: 10.48550/arxiv.1503.00825 · pith_short_12: X6ETWZRP7PWZ · pith_short_16: X6ETWZRP7PWZKJ4M · pith_short_8: X6ETWZRP

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/X6ETWZRP7PWZKJ4MREJWTWQB7N \
  | 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: bf893b662ffbed95278c891369da01fb4a557ade39b10182cbbef0b668971a49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b766de35432eaee8651a87cc514c125d3107638ab9c07fe7fe6d4eccd46ec27",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-03-03T04:24:30Z",
    "title_canon_sha256": "bd996002857f1d67c4d3dac06f2e36e11a71a82dde72398ca7171267662a6f63"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.00825",
    "kind": "arxiv",
    "version": 4
  }
}