Exploring Hyperbolic Geometry with The Geometer's Sketchpad von Dwyer, Marlene C., Pfiefer, Richard E.

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The Historical Development of J. J. Sylvester's Four Point Problem von Pfiefer, Richard E.

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Maximum and minimum sets for some geometric mean values von Pfiefer, Richard E.

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Stacking Ellipses von Pfiefer, Richard E.

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Stacking Ellipses von Pfiefer, Richard E.

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Circles, Vectors, and Linear Algebra von Pfiefer, Richard E., Van Hook, Cathleen

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Bounds on the Perimeter of an Ellipse via Minkowski Sums von Pfiefer, Richard E.

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Bounds on the Perimeter of an Ellipse via Minkowski Sums von Pfiefer, Richard E.

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70.42 The Density of Pythagorean Rationals von Pfiefer, Richard E.

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Surface area inequalities for ellipsoids using Minkowski sums von Pfiefer, RichardE

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Problems and Solutions von Pan, Yi-chuan, Tiu, Philip D., Valdinoci, Enrico, Far, Habib Y., Zhou, Li, Holshouser, Arthur L., Parmenter, Michael, Sastry, K. R. S., Pfiefer, Richard E., Tong, Zengxiang, Delany, Jim, Nelsen, Roger B., Seaman, William, Zerger, Monte J., Malm, Eric

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Problems and Solutions von Pan, Yi-chuan, Tiu, Philip D., Valdinoci, Enrico, Far, Habib Y., Zhou, Li, Holshouser, Arthur L., Parmenter, Michael, Sastry, K. R. S., Pfiefer, Richard E., Tong, Zengxiang, Delany, Jim, Nelsen, Roger B., Seaman, William, Zerger, Monte J., Malm, Eric

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Self-Circumference in the Minkowski Plane von Ghandehari, Mostafa, Pfiefer, Richard

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Self-circumference in the Minkowski plane von Ghandehari, Mostafa, Pfiefer, Richard

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The Historical Development of J. J. Sylvester's Four Point Problem von Pfiefer, Richard E.

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E3217 von Pfiefer, Richard E., Holshouser, A. L., King, L. R., Klein, B. G.

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Problems and Solutions von Klamkin, Murray S., Gulicher, Herbert, Juric, Neven, Penrice, Stephen, Zaiming, Zhang, Summer, John S., Dove, Kevin L., Carpenter, Richard, White, Homer, Byrd, Stan, Smith, Ronald L., Flanigan, Frank J., Andreoli, Michael H., Chyung, Jay, Neumer, Greg, Perz, Gottfried, Doster, David, Vowe, Michael, Hoehn, Larry, Eisner, Milton P., Guggenheimer, H., Pfiefer, Richard E., Seiffert, H.-J., Truitt, S. A., Yu, Sammy, Yu, Jimmy

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Problems and Solutions von Sarkar, Jyotirmoy, Neumer, Greg, Klamkin, Murray, Liu, Andy, Sadoveanu, Ioan, Fukuta, Jiro, Necochea, Alex, Edward T. H. Wang, Con Amore Problem Groupd, Monier, Jean-Marie, Schmidt, Frank, Schaumberger, Norman, Bang, Seung-Jin, Pfiefer, Richard E.

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Problems and Solutions von Sarkar, Jyotirmoy, Neumer, Greg, Klamkin, Murray, Liu, Andy, Sadoveanu, Ioan, Fukuta, Jiro, Necochea, Alex, Wang, Edward T. H., Groupd, Con Amore Problem, Monier, Jean-Marie, Schmidt, Frank, Schaumberger, Norman, Bang, Seung-Jin, Pfiefer, Richard E.

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Problems and Solutions von Klamkin, Murray S., Gulicher, Herbert, Juric, Neven, Penrice, Stephen, Zaiming, Zhang, Summer, John S., Dove, Kevin L., Carpenter, Richard, White, Homer, Byrd, Stan, Smith, Ronald L., Flanigan, Frank J., Andreoli, Michael H., Chyung, Jay, Neumer, Greg, Perz, Gottfried, Doster, David, Vowe, Michael, Prestonsburg Community College Problem Solving Group, Hoehn, Larry, Eisner, Milton P., Guggenheimer, H., Pfiefer, Richard E., H.-J. Seiffert, Truitt, S. A., Yu, Sammy, Yu, Jimmy

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