Exhibit (a)(5)(E)


FOR IMMEDIATE RELEASE

           MENTOR GRAPHICS SAYS IKOS REFUSAL TO PURSUE MENTOR MERGER
                  AGREEMENT AGAINST IKOS STOCKHOLDERS INTEREST

WILSONVILLE, OR -- January 23, 2002 -- Mentor Graphics Corporation (Nasdaq:
MENT) stated today that the refusal by the Board of Directors of IKOS Systems,
Inc. (Nasdaq: IKOS) to take the steps necessary for IKOS to sign Mentor's
merger agreement is against the interests of the IKOS stockholders.

Walden C. Rhines, Chairman and Chief Executive Officer of Mentor Graphics,
said, "From the perspective of an IKOS stockholder, we can't fathom why IKOS
didn't take steps to put it in a position to sign the merger agreement we sent
them on January 16. The IKOS Board decided once again that the Mentor deal is
superior to the Synopsys agreement. IKOS even implied that the outlook for IKOS
stockholders under the Synopsys agreement is worse than it was one month ago,
when IKOS first determined that our proposal was superior."

"Rather than focusing on the superiority of our $11.00 per share in cash tender
offer, the IKOS Board seized on certain conditions to closing the Mentor deal
as the basis not to proceed with our deal. This makes no sense. These
conditions are far less risky to IKOS than the very problematic conditions to
consummation of the Synopsys agreement. Moreover, as a practical matter, the
Mentor conditions should last only ten business days while the risky Synopsys
conditions will be in effect until a closing estimated for August or September
2002. As suggested by the IKOS filing with the SEC, IKOS is particularly
worried about satisfying the IKOS financial performance and employee retention
conditions in the Synopsys agreement," Dr. Rhines continued.

"In light of IKOS' actions today, we think it is time for the IKOS Board
to bring the Synopsys agreement -- an agreement that was signed over six months
ago -- up for a vote so that the stockholders get an opportunity to let the
Board know what they think of that deal, particularly as it compares to
Mentor's,"  Dr. Rhines concluded.

Pursuant to its all cash tender offer, Mentor Graphics is offering to acquire
IKOS Systems for $11.00 per share in cash of IKOS common stock. Mentor
Graphics' offer is not subject to any financing condition and is scheduled to
expire at 12:00 Midnight, New York City time on Friday, January 25, 2002,
unless extended. In addition, on January 16, 2002, Mentor Graphics delivered to
IKOS a merger agreement executed by Mentor which is superior to IKOS than its
existing Synopsys agreement. Mentor's execution of that agreement will not be
revoked prior to January 31, 2002.

ABOUT MENTOR GRAPHICS

     Mentor Graphics Corporation (Nasdaq: MENT) is a world leader in electronic
hardware and software design solutions, providing products, consulting services
and award-winning support for the world's most successful electronics and
semiconductor companies. Established in 1981, Mentor Graphics reported revenues
over the last 12 months of more than $600 million and employs approximately
3,000 people worldwide. Corporate headquarters are located at 8005 S.W.
Boeckman Road, Wilsonville, Oregon 97070-7777; Silicon Valley headquarters are
located at 1001 Ridder Park Drive, San Jose, California 95131-2314. World Wide
Web site: www.mentor.com.

Mentor Graphics is a registered trademark of Mentor Graphics Corporation. All
other company or product names are the registered trademarks or trademarks of
their respective owners.

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CONTACTS

Mentor Graphics Corporation               The Abernathy MacGregor Group
Ryerson Schwark                           Chuck Burgess
Tel: 503-685-1660                         Jason Thompson
                                          Tel: 212-371-5999