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EXHIBIT 21.1
List of Subsidiaries
1. Summit Design (EDA) Ltd., an Israeli Corporation.
2. Summit Verification, Inc., a Delaware Corporation.
3. ProSoft Oy, a Finnish Corporation.
4. Summit Design France, a French Corporation.
5. Summit Design, GmhH, a German Corporation.
6. Innovative Software, Inc., a Delaware Corporation.
7. Viewlogic Systems, Inc., a Delaware Corporation.
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