Pith Number

pith:2LTZORFN

pith:2026:2LTZORFNS3E4ZIVXGTWAV5XJJC

not attested not anchored not stored refs pending

Iskra: A System for Inverse Geometry Processing

Ahmed H. Mahmoud, Ana Dodik, Justin Solomon

Iskra differentiates existing geometry processing algorithms by applying the adjoint method directly to user-written imperative code.

arxiv:2602.12105 v2 · 2026-02-12 · cs.GR · cs.CV · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2LTZORFNS3E4ZIVXGTWAV5XJJC}

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.

Claims

C1strongest claim

Our system differentiates a broad class of geometric algorithms, exploiting existing fast problem-specific schemes common to geometry processing, including local-global and ADMM solvers.

C2weakest assumption

That the adjoint method applied to user-specified imperative code will generate an efficient and accurate backward pass for the targeted geometry processing algorithms without requiring reformulation or introducing significant overhead.

C3one line summary

Iskra provides a differentiable interface to common geometry processing algorithms by marrying scatter-gather mesh operations with tensor workflows and adjoint differentiation, enabling inverse applications.

Receipt and verification

First computed	2026-05-17T23:39:16.194884Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d2e79744ad96c9cca2b734ec0af6e9489c60ca4ad03d8ce5bba5007625774c22

Aliases

arxiv: 2602.12105 · arxiv_version: 2602.12105v2 · doi: 10.48550/arxiv.2602.12105 · pith_short_12: 2LTZORFNS3E4 · pith_short_16: 2LTZORFNS3E4ZIVX · pith_short_8: 2LTZORFN

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/2LTZORFNS3E4ZIVXGTWAV5XJJC \
  | 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: d2e79744ad96c9cca2b734ec0af6e9489c60ca4ad03d8ce5bba5007625774c22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c36ca2d44f733af5e46f651ce972a605170f266c9ef06012f82428e665d3a7ac",
    "cross_cats_sorted": [
      "cs.CV",
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.GR",
    "submitted_at": "2026-02-12T15:59:06Z",
    "title_canon_sha256": "199e668725bce90b68e74d7aac9d8568ec898277d44a166e1f6a962bf6b2c989"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.12105",
    "kind": "arxiv",
    "version": 2
  }
}