Pith Number

pith:Q2H2ERTM

pith:2015:Q2H2ERTMUZTJX6CDPEU4AVHNVF

not attested not anchored not stored refs pending

Regularization strategy for inverse problem for 1+1 dimensional wave equation

Jussi Korpela, Lauri Oksanen, Matti Lassas

arxiv:1509.04478 v1 · 2015-09-15 · math.AP · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q2H2ERTMUZTJX6CDPEU4AVHNVF}

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	2026-05-18T01:15:52.463700Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

868fa2466ca6669bf8437929c054eda95612f6eb4a001967e8c7b77354b9b458

Aliases

arxiv: 1509.04478 · arxiv_version: 1509.04478v1 · doi: 10.48550/arxiv.1509.04478 · pith_short_12: Q2H2ERTMUZTJ · pith_short_16: Q2H2ERTMUZTJX6CD · pith_short_8: Q2H2ERTM

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/Q2H2ERTMUZTJX6CDPEU4AVHNVF \
  | 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: 868fa2466ca6669bf8437929c054eda95612f6eb4a001967e8c7b77354b9b458

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f32192f2e4309f5f62e30bb2db71138fb38193e3cee48622f4712451acec55ad",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-09-15T10:16:39Z",
    "title_canon_sha256": "07683ec1be570ca5e75fe02c2b76a94748b47b6440f21c318f3ea285af28e7d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.04478",
    "kind": "arxiv",
    "version": 1
  }
}