Pith Number

pith:4TFY22O4

pith:2016:4TFY22O4H4ZRTUQZ3RFXALFMK2

not attested not anchored not stored refs pending

Inverse obstacle scattering with non-over-determined data

A. G. Ramm

arxiv:1604.01601 v3 · 2016-04-06 · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4TFY22O4H4ZRTUQZ3RFXALFMK2}

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	2026-05-18T00:43:35.855599Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4cb8d69dc3f3319d219dc4b702cac569b04d6325ecf24d2211b7e34a6fb4890

Aliases

arxiv: 1604.01601 · arxiv_version: 1604.01601v3 · doi: 10.48550/arxiv.1604.01601 · pith_short_12: 4TFY22O4H4ZR · pith_short_16: 4TFY22O4H4ZRTUQZ · pith_short_8: 4TFY22O4

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/4TFY22O4H4ZRTUQZ3RFXALFMK2 \
  | 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: e4cb8d69dc3f3319d219dc4b702cac569b04d6325ecf24d2211b7e34a6fb4890

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f5b6b72b94e6535242ef11ef7403c137714ec5ea848d3ff361dbace431c0a65",
    "cross_cats_sorted": [
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2016-04-06T13:07:25Z",
    "title_canon_sha256": "700807e7753dd67b94ac8b2ea113b308c558d701b0603b2b71fd57e04485da64"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.01601",
    "kind": "arxiv",
    "version": 3
  }
}