eng Ansari Education and Research Society Journal of Ultra Scientist of Physical Sciences August 2019 31 8 69 78 http://dx.doi.org/10.22147/jusps-A/310801 1516 article KIRAN YADAV 1 A. K. MALIK 2 Department of Mathematics, Singhania University, Pacheri Bari, Jhunjhunu (Rajasthan), (India) Department of Mathematics B. K. Birla Institute of Engineering & Technology, Pilani (Rajasthan), (India) <p>This study is devoted to the stabilization of following quadratic and modified quadratic functional equations in orthogonal space</p> <p>h (3x&nbsp;<img alt="pm" src="http://latex.codecogs.com/gif.latex?%5Cpm" />&nbsp;y) = 16h(x) + h(x <img alt="pm" src="http://latex.codecogs.com/gif.latex?%5Cpm" />&nbsp;y)&nbsp;,</p> <p>and</p> <p>h(x + ay) + h(x-ay) = 2a^2&nbsp;&nbsp;h(y) + 2h(x).</p> https://www.ultrascientist.org/paper/1516/ Orthogonal spaces Quadratic Modified functional equations