Or was it 1974? By Laurie Gwen Shapiro One morning in the mid-1970s, a solemn announcement came over the intercom at Friends Seminary: “Noted person John Lennon is now in the meetinghouse.

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We also establish the QCRLB for constrained quaternion parameters, including both nonsingular and singular cases of the quaternion FIM. These broaden the theoretical framework and enhance its ...