Pith Number

pith:FFUH4RWQ

pith:2015:FFUH4RWQ5C2XK6YDJ2WWGPY2QW

not attested not anchored not stored refs pending

Direct, nonlinear inversion algorithm for hyperbolic problems via projection-based model reduction

Alexander Mamonov, Andrew E. Thaler, Mikhail Zaslavsky, Vladimir Druskin

arxiv:1509.06603 v2 · 2015-09-14 · 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{FFUH4RWQ5C2XK6YDJ2WWGPY2QW}

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	2026-05-18T01:02:13.692703Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

29687e46d0e8b5757b034ead633f1a8584d998e8d87e753080dc2dce8b24f043

Aliases

arxiv: 1509.06603 · arxiv_version: 1509.06603v2 · doi: 10.48550/arxiv.1509.06603 · pith_short_12: FFUH4RWQ5C2X · pith_short_16: FFUH4RWQ5C2XK6YD · pith_short_8: FFUH4RWQ

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/FFUH4RWQ5C2XK6YDJ2WWGPY2QW \
  | 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: 29687e46d0e8b5757b034ead633f1a8584d998e8d87e753080dc2dce8b24f043

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2860a2655a110167f7f38ed3eabf6350a4729fe9d09fe6e59bafa19ef5aab586",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-09-14T18:37:25Z",
    "title_canon_sha256": "e8760345cd9a6168838073be9151917fc00de7ff47479cdc66f0fe23c2017c7f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.06603",
    "kind": "arxiv",
    "version": 2
  }
}