Pith Number

pith:55QUD4DL

pith:2017:55QUD4DLIGKUWMRMGO3PPM2RCY

not attested not anchored not stored refs pending

Well-posedness of the Goursat problem and stability for point source inverse backscattering

Eemeli Bl{\aa}sten

arxiv:1705.09442 v2 · 2017-05-26 · 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{55QUD4DLIGKUWMRMGO3PPM2RCY}

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	2026-05-18T00:32:30.870475Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ef6141f06b41954b322c33b6f7b351161c94b98eac70342a935c070a947b335a

Aliases

arxiv: 1705.09442 · arxiv_version: 1705.09442v2 · doi: 10.48550/arxiv.1705.09442 · pith_short_12: 55QUD4DLIGKU · pith_short_16: 55QUD4DLIGKUWMRM · pith_short_8: 55QUD4DL

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/55QUD4DLIGKUWMRMGO3PPM2RCY \
  | 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: ef6141f06b41954b322c33b6f7b351161c94b98eac70342a935c070a947b335a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "716cabc6ce4ee468360badd296e4b0206e67f65ec34c49126d13b16ff3b4cd79",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2017-05-26T06:17:13Z",
    "title_canon_sha256": "a67f05b166032371e2c718bff36d365de0eadff4fd78c77a643aefba6ea59d34"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.09442",
    "kind": "arxiv",
    "version": 2
  }
}