<?xml version="1.0" encoding="utf-8" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xl="http://www.w3.org/1999/xlink" version="1.1" viewBox="152 143 236 266" width="236pt" height="266pt" xmlns:dc="http://purl.org/dc/elements/1.1/"><metadata> Produced by OmniGraffle 6.1.3 <dc:date>2015-10-01 14:19:28 +0000</dc:date></metadata><defs><font-face font-family="Courier" font-size="9" units-per-em="1000" underline-position="-178.22266" underline-thickness="57.617188" slope="0" x-height="462.40234" cap-height="594.72656" ascent="753.90625" descent="-246.09375" font-weight="500"><font-face-src><font-face-name name="Courier"/></font-face-src></font-face><marker orient="auto" overflow="visible" markerUnits="strokeWidth" id="FilledArrow_Marker" viewBox="-9 -4 10 8" markerWidth="10" markerHeight="8" color="black"><g><path d="M -8 0 L 0 3 L 0 -3 Z" fill="currentColor" stroke="currentColor" stroke-width="1"/></g></marker><marker orient="auto" overflow="visible" markerUnits="strokeWidth" id="FilledArrow_Marker_2" viewBox="-1 -3 6 6" markerWidth="6" markerHeight="6" color="black"><g><path d="M 4 0 L 0 -1.5 L 0 1.5 Z" fill="currentColor" stroke="currentColor" stroke-width="1"/></g></marker><marker orient="auto" overflow="visible" markerUnits="strokeWidth" id="FilledArrow_Marker_3" viewBox="-1 -4 10 8" markerWidth="10" markerHeight="8" color="black"><g><path d="M 8 0 L 0 -3 L 0 3 Z" fill="currentColor" stroke="currentColor" stroke-width="1"/></g></marker></defs><g stroke="none" stroke-opacity="1" stroke-dasharray="none" fill="none" fill-opacity="1"><title>Canvas 1</title><g><title>Layer 1</title><path d="M 191.8421 190.41867 L 159.69867 190.41867 C 156.93725 190.41867 154.69867 192.65725 154.69867 195.41867 L 154.69867 227.5621 C 154.69867 230.32353 156.93725 232.5621 159.69867 232.5621 L 191.8421 232.5621 C 194.60353 232.5621 196.8421 230.32353 196.8421 227.5621 L 196.8421 195.41867 C 196.8421 192.65725 194.60353 190.41867 191.8421 190.41867 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(159.98828 144)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".099121094" y="9" textLength="10.801758">x0</tspan></text><text transform="translate(172.48828 205.0621)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".29956055" y="9" textLength="5.400879">f</tspan></text><path d="M 250.56 228.5621 L 250.56 194.5621 C 250.56 191.80068 248.32142 189.5621 245.56 189.5621 L 213.41656 189.5621 C 210.65514 189.5621 208.41656 191.80068 208.41656 194.5621 L 208.41656 228.5621 C 208.41656 231.32353 210.65514 233.5621 213.41656 233.5621 L 245.56 233.5621 C 248.32142 233.5621 250.56 231.32353 250.56 228.5621 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(179.48828 144)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".099121094" y="9" textLength="10.801758">x1</tspan></text><path d="M 219.00976 158.580075 L 219.00976 158.4 L 218.95242 189.5621" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(226.48828 206.0621)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".29956055" y="9" textLength="5.400879">f</tspan></text><path d="M 385.56 228.0621 L 385.56 194.0621 C 385.56 191.30068 383.32142 189.0621 380.56 189.0621 L 348.41656 189.0621 C 345.65514 189.0621 343.41656 191.30068 343.41656 194.0621 L 343.41656 228.0621 C 343.41656 230.82353 345.65514 233.0621 348.41656 233.0621 L 380.56 233.0621 C 383.32142 233.0621 385.56 230.82353 385.56 228.0621 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(369.5 143.28)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".099121094" y="9" textLength="10.801758">xn</tspan></text><path d="M 353.98828 158.080075 L 353.98828 157.9 L 353.95242 189.0621" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(361.48828 205.5621)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".29956055" y="9" textLength="5.400879">f</tspan></text><text transform="translate(257.98828 203.5621)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".19824219" y="9" textLength="21.603516"> ...</tspan></text><path d="M 164.98828 158.580075 L 164.98828 158.4 L 165.23071 189.91869" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 185.32 159.30007 L 185.32 159.12 L 185.56242 190.63869" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 238.50976 158.580075 L 238.50976 158.4 L 238.45242 189.5621" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 375.29585 158.080075 L 375.29585 157.9 L 375.26 189.0621" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 222.56 291.5621 L 222.56 257.5621 C 222.56 254.80068 220.32142 252.5621 217.56 252.5621 L 185.41656 252.5621 C 182.65514 252.5621 180.41656 254.80068 180.41656 257.5621 L 180.41656 291.5621 C 180.41656 294.32353 182.65514 296.5621 185.41656 296.5621 L 217.56 296.5621 C 220.32142 296.5621 222.56 294.32353 222.56 291.5621 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(198.48828 269.0621)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".29956055" y="9" textLength="5.400879">f</tspan></text><path d="M 175.77041 232.5621 L 175.77041 240.4621 L 175.77041 242.5621 L 183.36141 242.5621 L 190.95242 242.5621 L 190.95242 244.6621 L 190.95242 246.6621" marker-end="url(#FilledArrow_Marker_2)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 229.4883 233.5621 L 229.4883 241.4621 L 229.4883 243.0621 L 220.75623 243.0621 L 212.02416 243.0621 L 212.02416 244.6621 L 212.02416 246.6621" marker-end="url(#FilledArrow_Marker_2)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 357.50343 291.5621 L 357.50343 257.5621 C 357.50343 254.80068 355.26485 252.5621 352.50343 252.5621 L 320.36 252.5621 C 317.59857 252.5621 315.36 254.80068 315.36 257.5621 L 315.36 291.5621 C 315.36 294.32353 317.59857 296.5621 320.36 296.5621 L 352.50343 296.5621 C 355.26485 296.5621 357.50343 294.32353 357.50343 291.5621 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(333.43171 269.0621)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".29956055" y="9" textLength="5.400879">f</tspan></text><path d="M 364.4883 233.0621 L 364.4883 240.9621 L 364.4883 242.8121 L 355.72795 242.8121 L 346.9676 242.8121 L 346.9676 244.6621 L 346.9676 246.6621" marker-end="url(#FilledArrow_Marker_2)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 331.56 228.0621 L 331.56 194.0621 C 331.56 191.30068 329.32142 189.0621 326.56 189.0621 L 294.41656 189.0621 C 291.65514 189.0621 289.41656 191.30068 289.41656 194.0621 L 289.41656 228.0621 C 289.41656 230.82353 291.65514 233.0621 294.41656 233.0621 L 326.56 233.0621 C 329.32142 233.0621 331.56 230.82353 331.56 228.0621 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(307.48828 205.5621)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".29956055" y="9" textLength="5.400879">f</tspan></text><path d="M 310.4883 233.0621 L 310.4883 240.9621 L 310.4883 242.8121 L 318.19208 242.8121 L 325.89585 242.8121 L 325.89585 244.6621 L 325.89585 246.6621" marker-end="url(#FilledArrow_Marker_2)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 299.98828 158.080075 L 299.98828 157.9 L 299.95242 189.0621" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 321.29585 158.080075 L 321.29585 157.9 L 321.26 189.0621" marker-start="url(#FilledArrow_Marker)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><path d="M 293.06 381.5621 L 293.06 347.5621 C 293.06 344.80068 290.82142 342.5621 288.06 342.5621 L 255.91656 342.5621 C 253.15514 342.5621 250.91656 344.80068 250.91656 347.5621 L 250.91656 381.5621 C 250.91656 384.32353 253.15514 386.5621 255.91656 386.5621 L 288.06 386.5621 C 290.82142 386.5621 293.06 384.32353 293.06 381.5621 Z" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(268.98828 359.0621)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".29956055" y="9" textLength="5.400879">f</tspan></text><line x1="271.9883" y1="386.5621" x2="271.9883" y2="393.17031" marker-end="url(#FilledArrow_Marker_3)" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="201.4883" y1="296.5621" x2="214.87151" y2="309.94531" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="336.43173" y1="296.5621" x2="322.24383" y2="310.75" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><text transform="translate(228.30911 307.44) rotate(32)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".19824219" y="9" textLength="21.603516"> ...</tspan></text><text transform="translate(293.24 320.37127) rotate(-36)" fill="black"><tspan font-family="Courier" font-size="9" font-weight="500" x=".19824219" y="9" textLength="21.603516"> ...</tspan></text><line x1="261.45242" y1="342.5621" x2="250.56" y2="330.5254" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/><line x1="282.24" y1="342" x2="293.24" y2="330.8496" stroke="black" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/></g></g></svg>