Pith Number

pith:XFAE7URU

pith:2020:XFAE7URU5U5H2N7OB5K5OB5TVC

not attested not anchored not stored refs pending

Inverse electromagnetic obstacle scattering problems with multi-frequency sparse backscattering far field data

Tilo Arens, Xia Ji, XiaoDong Liu

arxiv:2002.09163 v1 · 2020-02-21 · 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{XFAE7URU5U5H2N7OB5K5OB5TVC}

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	2026-07-05T01:46:48.562224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9404fd234ed3a7d37ee0f55d707b3a8afb33d8a0580f4d9cf085ca495d4e473

Aliases

arxiv: 2002.09163 · arxiv_version: 2002.09163v1 · doi: 10.48550/arxiv.2002.09163 · pith_short_12: XFAE7URU5U5H · pith_short_16: XFAE7URU5U5H2N7O · pith_short_8: XFAE7URU

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/XFAE7URU5U5H2N7OB5K5OB5TVC \
  | 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: b9404fd234ed3a7d37ee0f55d707b3a8afb33d8a0580f4d9cf085ca495d4e473

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ddbb93b8647b9d46b18d69d7caf62f1dc43bd9330a1dca50cdc1a3585369af3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2020-02-21T07:34:44Z",
    "title_canon_sha256": "de1929b5b26df4e1796f076ea45674f62e2b7ccc66ab64c4fc20c95677e2e2b5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.09163",
    "kind": "arxiv",
    "version": 1
  }
}